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Brass pressure regulator, compact cylindrical body, 1/2 inch connections, adjustable 1 to 25 psi range

Watts

Watts 1/2 LF 26AA Pressure Regulator 1 to 25 psi

SKU CH-Q3T4-Q8SDD MPN 1/2

Regulates water pressure from 1 to 25 psi with a brass body rated to 300 psi and 140 °F maximum temperature

  • TypeDrain Components
  • Adjustable 1–25 psi range protects plumbing systems
  • Brass body resists corrosion for long service life
  • Handles up to 300 psi inlet pressure safely
  • Rated for 140 °F max temperature in hot water lines
  • Suitable for both commercial and residential installations

Commercial & Residential Pressure Regulator

The Watts LF26A regulator controls water pressure from 1 to 25 psi in commercial and residential plumbing systems. Its brass body handles inlet and outlet connections of 1/2 in. The unit operates at temperatures up to 140 Degrees F and withstands a maximum pressure of 300 psi.

Replaces Worn or Missing Regulating Valves

Install this valve when an existing pressure regulator fails to maintain stable downstream pressure or when a new supply line requires pressure reduction. The adjustment range suits low-pressure applications where standard factory settings are too high. The jump is worth it when pressure spikes damage fixtures or cause water hammer in the piping network.

Sustained Load Performance

Under continuous flow the brass body resists deformation at the rated 300 psi maximum pressure. The internal mechanism maintains the set pressure across the 1 to 25 psi range without drift during extended use. Heat resistance up to 140 Degrees F ensures reliable operation in hot-water recirculation loops. The compact 2 1/8 in length fits tight service spaces without stress on adjacent joints.

Highlights

  • Adjustable 1–25 psi range protects plumbing systems
  • Brass body resists corrosion for long service life
  • Handles up to 300 psi inlet pressure safely
  • Rated for 140 °F max temperature in hot water lines
  • Suitable for both commercial and residential installations

Specifications

TypeDrain Components
BrandWatts
Model1/2 LF 26AA

Questions about this item

What pipe size and orientation does the 1/2 LF 26AA regulator need for installation?

It fits 1/2 in pipe with 1/2 in inlet and outlet, measuring 2 1/8 in long and 4 3/8 in high.

What is the correct sequence for setting the 1 to 25 psi range on this regulator?

Install the valve, pressurise the system, then turn the adjustment screw until the desired pressure within the 1 to 25 psi range is reached.

When should the brass body or seals of this 140 °F rated regulator be inspected or replaced?

Inspect annually and replace if leakage appears or if operating temperatures exceed the 140 °F limit.

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