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Brass mixing valve with sweat connections, 3/4 inch inlets and outlets

Watts

Watts 3/4 LF70A Mixing Valve Trap

SKU CH-ATSK-2X7Z5 MPN 3/4

Lead-free brass mixing valve blends hot water at up to 10 gpm with a 150 psi pressure rating

  • Product typeDrain Components
  • Lead-free brass construction ensures safer potable water
  • 10 gpm flow rate at 10 psi delivers strong hot-water output
  • 120 °F to 160 °F temperature range suits residential heating needs
  • 150 psi maximum pressure rating handles typical supply lines
  • Sweat connections on 3/4 in inlets and outlets simplify copper installation

Valve for hot-water systems

The Watts 3/4 LF70A mixing valve blends hot and cold water to deliver a controlled outlet temperature between 120 and 160 degrees Fahrenheit. It is built from lead-free brass for potable-water installations and carries a maximum working pressure of 150 psi. The sweat connections suit standard 3/4-inch copper pipe.

Steady flow under continuous demand

The valve maintains its set temperature while passing up to 10 gallons per minute at a 10 psi pressure drop. Internal components are designed to resist scaling and wear during prolonged daily operation. Performance remains consistent across the full 120 to 160 degree range without sudden shifts.

Compact brass body runs cool and quiet

Lead-free brass construction adds minimal thermal mass, so the valve body stays near water temperature during normal use. No moving parts generate audible noise, and the valve draws no electrical power. The 4 1/8-inch height and 2 3/4-inch width fit tight mechanical rooms without special clearances.

How it compares

Measured against everything we stock in Drain Stoppers, Strainers & Traps, at today’s prices. Recalculated every night.

Price $91.99
Pricier than about 75% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameWatts
Model name3/4 LF70A
Product typeDrain Components

Questions about this item

Does the 3/4 LF70A mixing valve generate noise or heat when running continuously?

The valve is a passive brass component with no moving parts that produce noise or heat; it simply blends hot and cold water within the 120 to 160 degrees F range at up to 150 psi.

What piping and fittings must already be in place for the 3/4 LF70A to install and operate?

You need 3/4 inch copper tubing with sweat connections on both the hot and cold supply lines and the mixed outlet, plus flux and lead-free solder rated for 150 psi service.

Will the 3/4 LF70A mixing valve work with an older water heater that only reaches 120 degrees F?

Yes, the valve’s adjustable range starts at 120 degrees F, so it can pass through that temperature unchanged while still providing up to 10 gpm flow at 10 psi pressure drop.

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