Specification

Flow Characteristics
Zurn Industries, LLC
| Wilkins
1747 Commerce Way, Paso Robles, CA U.S.A. 93446  Ph. 855-663-9876, Fax [phone]
In Canada | Zurn Industries Limited
3544 Nashua Drive, Mississauga, Ontario L4V 1L2  Ph. 905-405-8272, Fax [phone]
www.zurn.com
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Typical Installation
Local codes shall govern installation requirements. Unless otherwise specified, the assembly shall be mounted on the cold
water supply and at least 18” from the cold water inlet to the heater. Note: Pre-charge should be adjusted to match incoming
water pressure (adjust pre-charge with no water pressure in tank). Not to exceed 80psi.
Speci cations
The Water Thermal Expansion Tank outer shell shall be carbon steel. The diaphragm shall be FDA approved butyl rubber and,
the water chamber shall be polypropylene lined to preclude water contact with the shell interior. The assembly shall have a
NPT Stainless steel system connection and a 0.301”-32 charging valve connection (standard tire valve) to facilitate the on-
site charging of the tank to meet system requirements. The tank shall be IAPMO® listed and certified to NSF/ANSI 61& 372.
The Water Thermal Expansion Tank shall be a ZURN WILKINS Model XT.
Model XT Installation
Sizing Chart
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T&P VALVE
TP1100A
DIRECTION OF FLOW
HOT WATER
HEATER
MODEL XT
DRAIN
HOSE BIBB
MODEL 975XL2
MODEL NR3XL
WATER PRESSURE
REDUCING VALVE