Honeywell TX Series Catalog Page

Residential Expansion Tanks

TX Series Expansion Tanks- Domestic Hot Water

The Honeywell Thermal Expansion Absorber is a welded,
pressurized expansion tank with a butyl diaphragm to control
excess pressure in potable hot water systems. The Thermal
Expansion Tank controls pressure build-up in the system,
eliminates relief valve spillage, protects fixtures and extends water
heater life.

• Heavy duty butyl rubber diaphragm (FDA approved) isolates water
from air.

• Polypropylene liner, 100% non-metallic, non-corrosive water
reservoir.

• Full size range: 2-211 gals., for all water heating volumes (ASME
available).

• Prevents water hammer.

• Maintenance free.

• Protects water heater from harmful pressure cycling.

• Allows storage of expanded water with no increase in system
pressures.

Maximum Operating Temperature: 200 F (93 C)
Maximum Operating Pressure: 150 psi (1034 kPa)
Precharge: 40 psi
Materials:

Shell: Steel

Product Number

TX-12/U 3/4 in. Male NPT 11 in. 279 mm 12 5/8 in. 321 mm 4.4 gal 16.7 L 3.2 gal 12.1 L 5 lb 2.27 kg

TX-25V/U 3/4 in. Female NPT 15 3/8 in. 390.5 mm 19 1/4 in. 489 mm 10.3 gal 39 L 10.3 gal 39 L 23 lb 10.43 kg

TX-30V/U 3/4 in. Female NPT 15 3/8 in. 390.5 mm 23 7/8 in. 606 mm 14.0 gal 53.1 L 11.3 gal 42.8 L 25 lb 11.34 kg

TX-42V/U 3/4 in. Female NPT 15 3/8 in. 390.5 mm 31 5/8 in. 803 mm 20.0 gal 75.7 L 11.4 gal 43.2 L 33 lb 14.97 kg

TX-5/U 3/4 in. Male NPT 8 in. 203.2 mm 12 5/8 in. 321 mm 2.0 gal 7.6 L 0.9 gal 3.41 L 5 lb 2.27 kg

Connection
Size (inch)

Connection
Typ e

Diameter Height Volume

inch mm inch mm gal L gal L lb kg

Connection: Brass
Liner: Polypylene
Diaphragm: Butyl

Maximum
Acceptance
Volume Weight

Controls

Hydronic

Service Check Valves

Service Check Valves for air vents and expansion tanks allow easy
field service without draining system.

CAUTION: Reduce system temperature to ambient and pressure to
0 psi before servicing component. Failure to do so may result in
injuries.

Maximum Operating Temperature: 240 F (115 C)
Maximum Operating Pressure: 100 psi (689 kPA)

Product Number Connection Size (inch) Connection Type

SCV-0125/U 1/8 in. Inlet FNPT, Outlet MNPT

SCV-050/U 1/2 in. Inlet FNPT, Outlet MNPT

70-6910 229