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Operation & Maintenance Manual
AquaSolve
®
Anti-Scale Systems
Chemical-Free, Salt-Free
Scale Prevention
M8414TM-COM (50 GPM)
M8416TM-COM (75 GPM)
Important: Read this Manual BEFORE using this equipment. Failure
to read and follow all safety and use information can result in death,
serious personal injury, property damage, or damage to the
equipment. Keep this Manual for future reference.
IOM-ASM1465TM_M1665TM
Manufacturing ASME Commercial Water Heaters Since 1961
PVI Industries • 3209 Galvez Avenue • Fort Worth, TX 76111
USA: T: (817) 335-9531 • Toll Free: (800) 784-8326 • PVI.com
Technical Support • (800) 433-5654 • Mon-Fri, 8 am - 5 pm EST
© 2019 PVI
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Operation & Maintenance Manual
AquaSolve
®
INTRODUCTION
The PVI AquaSolve Anti-Scale System provides protection from scale formation on internal plumbing
surfaces. The AquaSolve system can be installed
at the point of entry to a building to treat both hot
and cold water, or it can be located directly before a
water heater, boiler, or other water using device that
requires protection from hard water.
AquaSolve prevents scale by transforming the normal
dissolved hardness minerals into undissolved crystal microparticles. These crystals stay suspended in
the water and have a greatly reduced ability to react
and attach to surfaces like dissolved hardness does.
Therefore the problem of internal buildup of scale
in pipes, water heaters and on fixtures and glass is
greatly reduced.
AquaSolve is not a water softener or a chemical
additive (like antiscalants or sequestrants). It is a
scale prevention device with proven third party laboratory test data and years of successful residential
and commercial installation. AquaSolve is the one
water treatment device that effectively provides scale
protection and is a great saltfree alternative to water
softening (ion exchange) or scale sequestering chemicals. Laundry and warewashing chemistry will likewise require adjustments.
• Compatible with all on-site and community
wastewater treatment systems
• Perfect system for towns or communities where
water softeners are banned or restricted
• For high-flow applications, install multiple tanks
in parallel
• AquaSolve does not remove minerals or add
sodium to the water supply
• AquaSolve can be installed as pre-treatment to
commercial reverse osmosis systems (contact
your PVI representative for further details)
**For hot water applications where feed water
temperature is 100° - 140°F (38° - 60°C), please
contact PVI Technical Support at 1-800-433-5654.
WARNING
Do not use with water that is microbiologically unsafe or of
unknown quality without adequate disinfection before or after the
system.
Systems are certied through WQA against NSF/
ANSI Standard 372 for Lead Free compliance.
AquaSolve Benefits
• Chemical-free scale prevention and protection –
converts hardness minerals to harmless, inactive
microscopic crystals making AquaSolve an effective alternative technology to a water softener for
the prevention of scale due to water hard-ness
• Virtually maintenance free – no control valve
• Uses environmentally friendly technology by
using no salt or other chemicals to constantly
add, no electricity and no wastewater
• Improves efficiency of all water using appliances
– both hot** and cold
• Simple sizing and installation – all you need to
know is pipe size and the peak flow rate
• Safe for landscaping and lawn watering, no need
for costly bypass plumbing.
IOM-ASM1465TM_M1665TM Page 2 of 7Technical Support • (800) 433-5654 • Mon-Fri, 8 am - 5 pm EST
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Operation & Maintenance Manual
AquaSolve
®
Specifications
AquaSolve scale prevention system shall be installed
on the main water service pipe just after it enters the
building, but after other whole building water safety
devices (backflow preventers or pressure reducing
valves), to effectively address water hardness concerns. A system may also be installed further downstream to protect specific equipment or areas within
a plumbing system. The system shall be plumbed
with a bypass valve to allow isolation of tank(s) and
to allow the bypass of untreated water in the event
that service or media replacement be necessary. The
installation area should be suitable in size for the
tank(s) to be serviced without encumbrance and sit
upright on a flat level surface.
The system must operate in an upflow manner and
does not require additional water to backwash, flush,
or regenerate once put into service. The system does
not require any chemical additives and does not
require electricity for operation.
Multi-tank systems shall be installed in parallel with
PVC/CPVC manifold to meet peak flow rate requirements – see image below.
Standards
Independent scientific testing has confirmed
Template Assisted Crystallization (TAC) technology
provides scale reduction of over 95+%. Testing was
conducted under protocol based on DVGW W512
test to access control of scale formation.
NOTICE
Spotting may occur on external plumbing surfaces.
AquaSolve media systems perform best in single pass potable water applications with NO additional chemical additives.
Depending on hardness, soft scale spotting may occur. Soft scale
spots in most cases can be easily wiped down with a damp cloth
and will not form hard scale deposits. A Point of Use (POU) Water
Softener should be used on mandatory spot-free applications (e.g.
glass stemware, dishware).
CAUTION
• Not for use on closed loop systems.
• Do not let the system freeze. Damage to the tank may result.
• System must be operated in a vertical position. Do not lay
it down during operation. The system may be placed in any
position for shipping and installation but must be operated in
the vertical position.
• Place the system on a smooth, level surface. Because the system operates in an upflow, fluidized bed mode, having a level
surface is more important than with a softener or media filter.
• A bypass valve should be installed on every system to facilitate installation and service.
• Observe all local plumbing and building codes when installing
the system.
WARNING
Using AquaSolve with other water treatment equipment.
Due to the unique properties of AquaSolve, there are some unique
requirements for using AquaSolve in conjunction with other forms
of water treatment:
1. AquaSolve must be the last stage in the treatment chain. Do
not install any filters after AquaSolve or before any devices for
which scale prevention is required. POU filters, e.g. carbon,
RO or Ultraviolet (UV) are exempt from this requirement.
2. Do not apply phosphate or any other antiscalant before or
after AquaSolve.
3. The addition of soaps, chemicals, or cleaners, before or after
AquaSolve treatment, may reverse its anti-scale treatment
effects and/or create water with a heavy residue or spotting
potential. Any adverse conditions caused by the addition of
soaps, chemicals, or cleaners are the sole responsibility of the
end user.
4. AquaSolve is not a water softener and does not softener the
water - water treatment chemistry (e.g. antiscalants, seque
trants, soaps, chemicals or cleaners etc.) will most likely have
to be changed to be compatible with AquaSolve treated water.
Laundry and ware-washing chemistry will likewise require
adjustments.
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Operation & Maintenance Manual
AquaSolve
®
Equipment Specifications
AquaSolve systems are complete, selfcontained,
loaded with media, and ready to use. A simple
inlet and outlet connection is all that is required for
installation. Please review operating pressures, temperatures and water chemistry limitations to ensure
compatibility.
Feed Water Chemistry Requirements
pH 6.5 to 8.5
Hardness (max.) 30 grains
Water Pressure 15 psi to 150 psi
Temperature 40ºF to 100ºF (5ºC to 38ºC)
Chlorine <2 ppm
Iron (max.) 0.3 mg/l*
Manganese (max.) 0.05 mg/l**
Copper (max.) 1.3 ppm**
Oil & H2S Remove prior to AquaSolve
Phosphates Remove prior to AquaSolve
Silica (max.) 20 ppm***
TDS 1500 mg/l****
NOTICE
*Iron and Manganese
Just as with conventional water softening media, AquaSolve needs
to be protected from excess levels of certain metals that can easily coat the active surface, reducing its effectiveness over time.
Public water supplies rarely, if ever, present a problem, but if the
water supply is from a private well, confirm that the levels of iron
(Fe) and manganese (Mn) are less than 0.3 mg/L and 0.05 mg/L
respectively.
**Copper
Pursuant to the EPA drinking water standards, the copper concentration permitted is up to 1.3 ppm. Typically originating from new
copper plumbing, high levels of copper can foul AquaSolve media.
For applications with copper concentration greater than 1.3 ppm,
please contact PVI Technical Support at 1-800-433-5654.
To further minimize any problem with excess
copper, avoid applying excessive flux on the
inner surfaces of the pipe and use a lowcorrosivity water soluble flux listed under the
ASTM B813 standard.
***Silica
AquaSolve media does not reduce silica scaling.
While silica tends to have a less significant effect
on scale formation than other minerals, it can
act as a binder that makes water spots and
scale residue outside the plumbing system
difficult to remove. This 20 ppm limitation is for
aesthetic purposes.
****All other contaminants must meet the requirements of the
USEPA Safe Drinking Water Act. Specific Mineral and Metal
MCLs, identified in Watts’ published Feed Water Chemistry
Requirements, supersede the USEPA SDWA.
NOTICE
Water known to have heavy loads of dirt and debris may require
prefiltration prior to AquaSolve.
*See note about iron, manganese and copper (bottom left).
Systems using AquaSolve technology prevent hard water scale
formation inside the plumbing system at influent hardness levels
of 30 grains per gallon of calcium carbonate and less. Due to variances in water chemistry, certain aesthetic conditions external of
the plumbing system may not be attained. AquaSolve is designed
for the treatment of potable water that meets the requirements of
the current USEPA Safe Drinking Water Act.
Mechanical Specifications
Model M8414TM-COM M8416TM-COM
Dry Weight
lbs/kg
Service Weight
lbs/kg
Inlet/Outlet
Connection
124 / 56 145 / 66
458 / 208 550 / 250
2” FNPT 2” FNPT
Replacement Media
M8414-COM-RM Replace media every 3 years
M8416-COM-RM Replace media every 3 years
Dimensions (nominal - inches)
Model M8414TM-COM M8416TM-COM
a 14 16
b 73.1 73.1
Max. Service Flow (gpm) vs. Water Temp. (ºF)
System 40º 45º 50º 55º 60º 65º 70º
M8414TM 40 44 48 50 50 50 50
M8416TM 45 51 56 59 63 69 75
Intermittent Duty Systems
M8414TM-COM 50 gpm at all temperatures
M8416TM-COM 75 gpm at all temperatures
Max. Flow Rate***
M8414TM-COM 50 gpm 189 lpm
M8416TM-COM 75 gpm 284 lpm
***Exceeding maximum flow can reduce effectiveness and void
warranty.
Pressure drop at peak flow rate is less than 22 psi.
Pressure drop reading taken with inlet and outlet gauges installed
at a common elevation and 80 degree feed water.
IOM-ASM1465TM_M1665TM Page 4 of 7Technical Support • (800) 433-5654 • Mon-Fri, 8 am - 5 pm EST
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Operation & Maintenance Manual
AquaSolve
®
Installation
Tighten the tank head
NOTICE
Check the head on top of the tank. It’s common for it to loosen
during shipment. Tighten the head with a strap wrench as needed.
NOTICE
*It is very important to use flexible connections on the inlet and
outlet plumbing in the horizontal orientation as shown in the
images on this page. The tanks expand and contract with water
pressure fluctuations. Flexible connectors will prevent plumbing
and tank leaks. The EDP code for the suggested PVI 2” Flexible
Connectors is C515285 (Two are included and required for installation).
Anytime AquaSolve systems are installed above the ground floor
of a building it is recommended that a vacuum relief valve also be
installed to protect against tank collapse in the event the plumbing system is drained. If a vacuum relief valve is not used then the
system should be placed in bypass anytime the plumbing system
is drained. The EDP code for the suggested vacuum relief valve is
0556031 (not included). The vacuum relief valve should be
installed on the outlet of the system.
NOTICE
• We recommend the installation of a dual-union ball-valve on
the inlet and outlet to isolate the tank for servicing.
• A full bypass should be installed so that the full service flow
can be routed around the system as needed for servicing.
steady stream of water appears at the drain, close
the supply valve and hose bibb.
Open the inlet and outlet valves on the system.
Transfer the bypass valves from Bypass to the
Service position. Open a nearby faucet downstream
from the AquaSolve system to relieve any air.
Check for leaks. Repair as needed.
NOTICE
Fill in install date and rebed due date on product label located
on front of each tank as reminder to replace AquaSolve media
every 3 years. The system is now ready for service.
Typical Installation for Single and
Multi-Bank Systems
Install Piping
Connect the inlet and outlet plumbing according to
your preferences and any applicable local codes.
Include sample/drain ports with hose-bibb connections on the inlet and outlet piping to facilitate startup
and service.
WARNING
Support the Piping
2 inch Flex Connectors must be installed horizontally not vertically
in the water pipe line. The full weight of the piping and valves must
be supported by uni-strut, pipe hangers or other means. The tank
connections cannot support the weight of the piping. The image
below for a multi-tank system installation shows properly supported piping.
Start-Up
Connect a hose to the hose bibb on the outlet of
the tank. Run the hose to a drain and open the hose
bibb.
Slowly/partially open the supply water ball valve.
Allow the tank to slowly fill with water. When a
IOM-ASM1465TM_M1665TM Page 5 of 7Technical Support • (800) 433-5654 • Mon-Fri, 8 am - 5 pm EST
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Operation & Maintenance Manual
AquaSolve
®
NOTICE
Your AquaSolve media should be replaced every 3 years.
Replacing the Media
1. Shut off the primary feed supply going to the
AquaSolve tank.
2. Open up a downstream spigot or faucet to release
pressure in the tank and in the distribution lines
before and after the system.
3. Shut the isolation valves immediately before and
after the tank.
4. Disconnect the unions on the inlet and outlet of
the tank, and then disconnect flex connectors from
head.
5. Using a step ladder and strap wrench, remove
the threaded head assembly connection (turning
counter-clockwise) and remove the complete upper
assembly including grey-colored PVC strainer.
Rinse these parts in a nearby sink or bucket of
water. Do not drain the tank.
6. Remove the distributor tube with the bottom strainer. Rinse these parts in a nearby sink or bucket of
water.
7. Get a 6ft length of 3/4” sch. 40 PCV and a length
of 1” polyvinyl hose. The length of hose depends
on the distance to the nearest floor drain. (Both of
these can be acquired at Home Depot or Lowes.)
8. Insert one end of the pipe inside the hose and put
the other end of the pipe into the top of the tank
and down into the media. Put the other end of the
hose inside a rice bag and put the rice bag on the
floor drain.
9. Get a garden hose and put it on the open end of
the poly hose to fill the hose and pipe with water.
Air will bubble out of the tank. Once all the air is
out of the hose and pipe, you can start a siphon to
remove the media. Put the garden hose in the top
of the tank and turn it on to keep the tank full of
water. Push the pipe up and down in the media to
get it all out. The rice bag will catch the media and
allow the water to go down the drain.
10. Try not to be too aggressive when extracting the
media. You need to take it out in small bites. If you
let the whole pipe/ hose fill with media it will plug
up. You need to let slugs of water flush out the pipe
as you go.
11. When all the old media is removed turn off the garden hose and continue to siphon until the tank is
about half full with water.
12. Using the step ladder again, reinstall the distributer tube with bottom strainer that was removed in
step #6. Center the distributor tube in the bottom
of the tank. Keeping any and all media from entering the distributor tube, carefully pour-in a new
bag(s) of media that specifically meets the replacement requirement of the tank. For example, an
M8416-TM-COM system requires (x1) OF1665RM
Replacement Media.
13. Inspect the threaded connection on the top of the
tank to ensure no loose beads of media are stuck
to the internal threads. If visible, wipe away the
beads with a damp cloth.
14. Re-attach the head assembly onto the distributor
tube and thread the head assembly back onto the
tank. Hand-tighten until the final turn when a strap
wrench can help tighten the connection.
15. Reconnect the flex connectors and union connections.
16. Open the feed water inlet (slowly) to fill the tank.
17. Purge the air at a downstream faucet close to the
system.
18. Once the tank is full, wait 4 hours for media to
“hydrate”.
19. Put the tank in service.
Alternative Method for Replacing Media
Follow steps 1 – 6 then,
• Remove center distributor tube and lower basket
and siphon all water from tank
• Lay tank down on its side
and tip upside down while
using hose to flush
media out
• When all the old media is
removed, stand tank back
up and install in original
position. Fill the tank so
that it is about half full
with water.
Then continue with
steps 12 – 19.
IOM-ASM1465TM_M1665TM Page 6 of 7Technical Support • (800) 433-5654 • Mon-Fri, 8 am - 5 pm EST
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Operation & Maintenance Manual
AquaSolve
®
Parts List
Item Qty. PVI Part # Description
1 1 149692
Tank head only basket
assembly is separate basket
2 2 144065 Flex hose 2” x 12”
3 1 144066
Riser and bottom
distributor assembly
4a 1 144067 14” X 65” tank 4” top
4b 1 144068 16” X 65” tank 4” top
Limited Warranty
PVI warrants its AquaSolve tank system as follows:
• AquaSolve tank system is warranted to be free of defects in materials and workmanship for 5 years from the date of original shipment.
• The AquaSolve media is warranted for performance for a period of
2 years from the date of the original installation when installed and
oper-ated in accordance with the instructions in the corresponding
Installation and Operation Manual. PVI warrants its AquaSolve cartridge systems as follows:
• The AquaSolve cartridge system is warranted to be free of defects
in materials and workmanship for 1 year from the date of original
shipment.
• AquaSolve cartridges are warranted for performance for a period
of one year from the date of original installation when installed and
operated in accordance with the instructions in the corresponding
Installation and Operation Manual.
• Carbon replacement filter cartridges are not warranted to perform for
any period of time because the service life of replacement carbon
filter cartridges varies significantly with local water conditions and
volume.
1. AquaSolve system must be installed in applications with municipally
supplied water adhering to EPA guidelines with the exception of
oil and grease, copper, phosphate, silca and chlorine. See copper
warnings on page 2 and condition number 5 below.
2. Any component failure must not result from abuse, fire, freezing or
other acts of nature, violence, or improper installation.
3. Equipment must be installed and operated in compliance with the
local plumbing codes and on an approved water supply.
4. Equipment is limited to use at water pressures and temperatures that
do not exceed our published specifications.
5. Water supply must not exceed 2.0 PPM chlorine. For water supply
exceeding 2.0 PPM chlorine, pretreatment is required. (Please contact your water treatment specialist.)
6. Information, including model number, serial number, and date of
installation, must be provided for any claims pertaining to equipment
in warranty.
7. Defective parts are subject to inspection by either PVI or any authorized representative before final commitment of warranty adjustment
is made.
8. PVI reserves the right to make changes or substitutions in parts or
equipment with material of equal quality or value and of then current
production.
Limitations
Our obligation under this warranty with respect to the tank or valve is
limited to furnishing a replacement for, or at our option, repairing any
part or parts to our satisfaction that prove defective within the warranty
period stated above. Such replacement parts will be delivered to the
owner F.O.B. nearest factory, at no cost, excluding freight and local
labor charges, if any. Our obligation under this warranty with respect to
the AquaSolve media will be limited to furnishing a replacement for the
media within two years from date of original installation. Such replacement media will be delivered to the owner F.O.B. nearest factory, at no
cost, excluding freight and local labor charges, if any. Damage to the
media due to chlorine, other oxidizers or fouling caused by local water
conditions or any other operation outside of the limits shown under
Specifications, is not covered by this warranty.
The warranty set forth herein is given expressly and is the only warranty
given by PVI company with respect to the product. PVI company makes
no other warranties, express or implied. PVI company hereny specifically
disclaims all other warranties, express or implied, including but not limited to the implied warranties of merchantablity and fitness for a particular
purpose.
The remedy described under this warranty shall constitute the sole and
exclusive remedy for breach of warranty, and PVI company shall not
be responsible for any incidental, special or consequential damages,
including without limitation, freight, handling, lost profits or the cost of
repairing or replacing other property which is damaged if this product
does not work properly, other costs resulting from labor charges, delays,
vandalism, negligence, fouling caused by foreign material, damage from
adverse water conditions, chemical, or any other circumstances over
which PVI company has no control. This warranty shall be invalidated
by any abuse, misuse, misap-plication or improper installation of the
product.
Some states do not allow limitations on how long an implied warranty
lasts, and some states do not allow the exclusion or limitation of incidental or consequential damages. Therefore the above limitations may not
apply to you. This warranty gives you specific legal rights, and you may
have other rights that vary from state to state. You should consult applicable state laws to determine your rights. So far as is consistent with
applicable state law, any implied warranties that may not be disclaimed,
including the implied warrantied of merchanability and fitness for a particular purpose, are limited in duration to the applicable warranty periods
stated above.
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