Install Instructions

Model NR3XL LEAD-FREE*
Pressure Reducing Valve with Integral By-pass
(1/2", 3/4", 1", 1-1/4" 1-1/2" & 2")
*This product contains a weighted average lead content less than 0.25% for wetted surfaces.
*Certied to NSF/ANSI 61-G
REPAIR KIT INSTRUCTIONS
HOW TO MAKE REPAIRS
(Shut off service before starting disassembly)
1. Open faucet on dwelling to remove line pressure.
2. Note distance that adjustment bolt protrudes from bell
housing. Loosen locknut on adjustment bolt, then turn
adjustment bolt out of bell housing to remove spring tension.
3. Unscrew bell housing counterclockwise and remove spring,
spring disc and friction ring.
4. Remove cartridge from regulator by gripping retaining bolt
with pliers and pulling outwards away from body.
5. Clean screen by removing from cartridge. Ensure both upper
and lower o-rings are in place.
TO REASSEMBLE:
1. While disassembled, open inlet of water service to ush out
valve body and service line of debris.
2. Replace old cartridge assembly with new cartridge assembly.
Push the cartridge into bore in body making sure o-rings
seal tight against both the cartridge and body.
3. Replace friction ring, spring, spring disc and bell housing.
(Make sure friction ring is installed with raised edge facing
up). Tighten bell housing onto body by threading clockwise.
4. Turn adjustment bolt into bell housing to old setting.
5. Enter dwelling and turn on several faucets.
6. Turn on water service. Let water run for several seconds then
turn off faucets in dwelling.
7. Adjust regulator to desired pressure by turning adjustment
bolt clockwise (into bell housing) to raise pressure or
counterclockwise (out of bell housing) to lower pressure.
NOTE: When reducing pressure open a downstream faucet
to relieve pressure.
8. Tighten locknut when desired pressure is achieved.
INSTALLATION INSTRUCTIONS
Before installing reducing valve, ush out line to remove loose
dirt and scale which might damage seal ring and seat. Install
valve in line with arrow on valve body pointing in direction of ow.
All valves will be furnished with stock settings to reduce to 50
psi. To readjust reduced pressure, loosen outer locknut and turn
adjustment bolt clockwise (into bell housing) to raise reduced
pressure, or counterclockwise (out of bell housing) to lower
reduced pressure. May be installed in horizontal or vertical
position.
NOTICE: Annual inspection and maintenance is required of
all plumbing system components. To ensure proper perfor-
mance and maximum life, this product must be subject to
regular inspection, testing and cleaning.
Regulators in series: Where the desired pressure
reduction is more than a 4 to 1 ratio (i.e. 200psi
to 50psi), multiple regulators in series should be
installed.
SEALED CAGE WARNING: Loosen lock washer at
adjustment bolt slowly. Look for any trapped water
pressure under the sealed cage washer. Relieve
pressure before removing bell.
CAUTION: Anytime a reducing valve is adjusted, a
pressure gauge must be used downstream to verify
correct pressure setting. Do not bottom out adjust-
ment bolt on bell housing. Valve may be installed in
any position.
BODY
UNION NUT
TAILPIECE
*UPPER O-RING
*LOWER O-RING
*CARTRIDGE ASSEMBLY
*SPRING
*FRICTION RING
BELL HOUSING
ADJUSTMENT
BOLT
*SPRING DISC
LOCKNUT
*UNION GASKET
*RETAINING BOLT
FRICTION RING DETAIL
*INDICATES PARTS SUPPLIED IN REPAIR KITS
SIZE: 1"
SEALED CAGE WASHER
*SEAL RING
*SCREEN
ADJUSTMENT BOLT
NAME PLATE
*FRICTION RING
BELL HOUSING
*SPRING DISC
*SPRING
*CARTRIDGE ASSEMBLY
UNION NUT
TAILPIECE
*UNION GASKET
*SCREEN
*UPPER O-RING
*SEAL RING
*LOWER O-RING
SIZES: 1-1/4" - 2”
LOCKNUT
FRICTION RING DETAIL
BODY
SEAL CAGE WASHER
NR3XL
NR3 XL
2
 Installation  Maintenance Instructions
®
Proposition 65 Warning This product contains chemicals known to the State of California to cause
cancer or birth defects or other reproductive harm.
1
®
WARRANTY: ZURN WILKINS Valves are guaranteed against defects of material or workmanship when used for the services recom-
mended. If in any recommended service, a defect develops due to material or workmanship, and the device is returned, freight prepaid,
to ZURN WILKINS within 12 months from date of purchase, it will be repaired or replaced free of charge. ZURN WILKINS’ liability shall
be limited to our agreement to repair or replace the valve only.