Watts FR 500 User Manual
Watts Regulator FR 500
Thermostatic Freeze Relief Kit
The FR500 Thermostatically measures the water temperature and will open at 35 °F, and close at 40ºF. This design
keeps the water from freezing in the backflow preventer, while
avoiding discharges based on the air temperature dropping to or
below freezing.
Installation:
The FR500 should be installed where freezing is of concern based on exposed
piping. When the valve is used in conjunction with a backflow preventer the FR500
should be located down stream of the assembly. Please note that additional
FR500s can be located upstream if desired.
The valve can be installed at any orientation to the centerline of the pipeline.
However, whenever possible the valve should be vertical down to horizontal.
This will allow the water to drain out of the FR500’s outlet and avoid the potential
of an ice dam impairing the function of the valve.
Care should be given to ensure that discharged water will be adequately piped
away from areas where slipping on ice could be a danger, like roadways and
pathways. Do not insulate the FR500 or install it where it will be exposed
to a heatsource.
Materials
Springs Stainless Steel
Body Bronze
Internals DZR Brass
Pressure - Temperature
Working Temperature: 35ºF (1.6ºC)
Maximum Pressure: 175psi (12.06 bar)
Approvals
IAPMO
IS-FR500
Watts Regulator FR 500
Thermostatic Freeze Relief Kit
The FR500 Thermostatically measures the water temperature and will open at 35°F, and close at 40ºF. This design
keeps the water from freezing in the backflow preventer, while
avoiding discharges based on the air temperature dropping to or
below freezing.
Installation:
The FR500 should be installed where freezing is of concern based on exposed
piping. When the valve is used in conjunction with a backflow preventer the FR500
should be located down stream of the assembly. Please note that additional
FR500s can be located upstream if desired.
The valve can be installed at any orientation to the centerline of the pipeline.
However, whenever possible the valve should be vertical down to horizontal.
This will allow the water to drain out of the FR500’s outlet and avoid the potential
of an ice dam impairing the function of the valve.
Care should be given to ensure that discharged water will be adequately piped
away from areas where slipping on ice could be a danger, like roadways and
pathways. Do not insulate the FR500 or install it where it will be exposed
to a heatsource.
Materials
Springs Stainless Steel
Body Bronze
Internals DZR Brass
Pressure - Temperature
Working Temperature: 35ºF (1.6ºC)
Maximum Pressure: 175psi (12.06 bar)
Approvals
IAPMO
IS-FR500
1
/8", 1/4"
1
/2", 3/4"
1
/8", 1/4"
1
/2", 3/4"
Limited Warranty: Watts Regulator Company warrants each product to be free from defects in material and workmanship
under normal usage for a period of one year from the date of original shipment. In the event of such defects within the war-
ranty period, the Company will, at its option, replace or recondition the product without charge.This shall constitute the sole
and exclusive remedy for breach of warranty, and the Company shall not be responsible for any incidental, special or conse-
quential damages, including without limitation, lost profits or the cost of repairing or replacing other property which is dam-
aged 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 the
Company has no control. This warranty shall be invalidated by any abuse, misuse, misapplication or improper installation of
the product. THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING ANY IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Any implied warranties that are imposed
by law are limited in duration to one year.
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 Limited 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.
IS-FR500 0531 EDP# 1915920 ©Watts Regulator Company, 2005
USA: 815 Chestnut St., No. Andover, MA 01845-6098; www.wattsreg.com
Canada: 5435 North Service Rd., Burlington, ONT. L7L 5H7; www.wattscanada.ca
Note: That when insulating piping, freeze relief should not be
insulated to guarantee that this is the coldest section.
FR500
• 1/8" &
1
/4" install FR 500 via downstream tee
•
1
/2" &
3
/4" install FR 500 via downstream tee or with additional shutoff tap
Remove plug and install FR 500
Downstream Tee Installation
Additional Shutoff Tap Installation
Limited Warranty: Watts Regulator Company warrants each product to be free from defects in material and workmanship
under normal usage for a period of one year from the date of original shipment. In the event of such defects within the war-
ranty period, the Company will, at its option, replace or recondition the product without charge.This shall constitute the sole
and exclusive remedy for breach of warranty, and the Company shall not be responsible for any incidental, special or conse-
quential damages, including without limitation, lost profits or the cost of repairing or replacing other property which is dam-
aged 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 the
Company has no control. This warranty shall be invalidated by any abuse, misuse, misapplication or improper installation of
the product. THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING ANY IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Any implied warranties that are imposed
by law are limited in duration to one year.
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 Limited 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.
IS-FR500 0531 EDP# 1915920 ©Watts Regulator Company, 2005
USA: 815 Chestnut St., No. Andover, MA 01845-6098; www.wattsreg.com
Canada: 5435 North Service Rd., Burlington, ONT. L7L 5H7; www.wattscanada.ca
Note: That when insulating piping, freeze relief should not be
insulated to guarantee that this is the coldest section.
FR500
• 1/8" &
1
/4" install FR 500 via downstream tee
•
1
/2" &
3
/4" install FR 500 via downstream tee or with additional shutoff tap
Remove plug and install FR 500
Downstream Tee Installation
Additional Shutoff Tap Installation
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