Installation Guide

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.
*Meets the requirements of NSF/ANSI 61
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 counterclock-
wise (out of bell housing) to lower pressure. NOTE: When re-
ducing 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 adjust-
ment bolt clockwise (into bell housing) to raise reduced pressure,
or counterclockwise (out of bell housing) to lower reduced pres-
sure. May be installed in horizontal or vertical position.
NOTICE: Annual inspection and maintenance is required of all
plumbing system components. To ensure proper performance
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 regu-
lators in series should be installed.
SEALED CAGE WARNING: Loosen lock washer at adjust-
ment 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 adjustment 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
®
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.
! WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
! ADVERTENCIA: Cáncer y daño reproductivo - www.P65Warnings.ca.gov
! AVERTISSEMENT: Cancer et néfastes sur la reproduction - www.P65Warnings.ca.gov
ZURN WILKINS
1747 Commerce Way, Paso Robles, CA 93446 Phone:[phone] Fax:[phone]
www.zurn.com
®