Watts P777 User Manual
For OEM Applications
ES-P777
Job Name
Job Location
Engineer
Approval
LEAD FREE
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*
Series P777
Plastic Wye-Pattern Strainers
Sizes: 1⁄4" – 3⁄8" (8 – 10mm)
Series P777 Plastic Wye-Pattern Strainers are designed to
ensure protection to mechanical equipment from the destructive effects of dirt, scale and foreign objects. These 45˚
wye-pattern strainers are for OEM applications where space
requirements are limited.
Features
• Very compact
• Corrosion-resistant
• O-ring sealed, quick clean out plug
• Standard 100 mesh stainless steel screen
• Optional screens available, consult local Watts Agent
Contractor
Approval
Contractor’s P.O. No.
Representative
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P777
Specifications
A plastic wye-pattern strainer shall be installed to protect
mechanical equipment from dirt, scale and foreign objects
where indicated on the plans. Strainer shall be corrosionresistant and compact. Strainer shall be manufactured out
of NSF approved plastic and come standard with 100 mesh
stainless steel screen. Strainer shall be a Watts Series P777.
Pressure
Maximum Working Pressure: 300psi (21 bar) CWP
Materials
Body: NSF approved, glass-filled, Noryl® plastic
Cleanout Plug: NSF approved glass filled Noryl® plastic
Screen: 304 stainless steel
O-ring: Buna-N
Noryl® is registered trademark of SABIC Innovative Plastics™.
*The wetted surface of this product contacted by consumable
water contains less than one quarter of one percent (0.25%) of
lead by weight.
Dimensions
7
⁄8" D.
(22mm)
13⁄4"
(44mm)
Body
17⁄8"
(48mm)
O-ring
1
⁄2"
(13mm)
Cleanout Plug
Available in
1
⁄4" and 3⁄8"
NPT
Screen
304 SS
Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements,
please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials without prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.
Performance
Flow rates using standard 100 mesh screen
lpm gpm
30 8
27 7
23 6
19 5
15 4
11 3
Flow Rate (water)
8 2
2 4 6 8 10 12 14 16 18 20 psi
.1 .3 .4 .6 .7 .8 1.0 1.1 1.2 1.4
Pressure Drop
3
(10mm)
1
(8mm)
bar
⁄8"
⁄4"
*Micronic Wire ø Width %
Model Retention Mesh (in.) Opening (in.) Open Area
P777-40 400 40 .010 .016 36.0
P777-60 230 60 .0075 .009 30.5
P777-80 180 80 .0055 .007 31.4
†P777-100 140 100 .0045 .0055 30.3
*Average particle retention for round particles.
†
Standard 100 mesh screen.
A Watts Water Technologies Company
Canada: 5435 North Service Rd., Burlington, ONT. L7L 5H7; www.wattscanada.ca
ES-P777 0933 © 2009 Watts
USA: 815 Chestnut St., No. Andover, MA 01845-6098; www.watts.com
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