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Brass thermostatic mixing valve with compression fittings

Acorn Engineering Company

Acorn Engineering Company ST70-38-BCT Tempering Valve Compression Inlet Brass

SKU CH-SF23-NZTZS

Thermostatic mixing valve with brass body, compression inlets and outlets at 3/8 in, flow rate 4 gpm, temperature range 85 to 115 degrees F, maximum pressure 125 psi.

  • Product colorTransparent
  • Product typePipes, Valves & Fittings
  • Precise temperature control for safe lavatory use with 85 to 115 Degrees F range
  • Durable brass body withstands 125 psi maximum pressure for long service life
  • Easy compression inlet and outlet connections fit 3/8 in piping without soldering
  • Integral check valves prevent cross-flow between hot and cold supply lines
  • Includes 3/8 in brass compression tee for complete installation in one package

Thermostatic Mixing Valve for Lavatories

This thermostatic mixing valve blends hot and cold water to a stable outlet temperature for lavatory fixtures. It is designed for residential or light commercial bathrooms where precise temperature control is required. The brass body and integral check valves provide durable, code-compliant performance for point-of-use applications.

Temperature Range and Pressure Limits

The valve delivers a mixed outlet temperature adjustable between 85 and 115 degrees Fahrenheit. It accepts hot inlet supply from 120 to 180 degrees and cold inlet supply from 35 to 80 degrees. Maximum operating pressure is 125 psi, and the flow capacity is rated at 4 gallons per minute.

Replaces Non-Thermostatic Supply Fittings

This valve upgrades a standard hot-and-cold supply stop by adding automatic temperature regulation and backflow prevention. The jump is worthwhile when scald protection is mandated or desired at a single lavatory. It is not suited for high-flow fixtures such as showers or tub fillers that exceed the 4 gpm capacity.

How it compares

Measured against everything we stock in Bath Accessories & Soap Dispensers, at today’s prices. Recalculated every night.

Price $67.99
Pricier than about 64% of the 1,499 comparable items (median $39.99).

Specifications

Product
Brand nameACORN CONTROLS
Product colorTransparent
Product typePipes, Valves & Fittings

Questions about this item

Which temperature range should I select for a lavatory installation?

The valve delivers a fixed 85 to 115 degrees Fahrenheit outlet range, so no selection is needed — it covers standard lavatory requirements.

What does the 4 gpm flow rate mean when the valve is installed?

It indicates the valve can supply up to 4 gallons per minute through the 3/8 inch compression ports under normal supply pressures.

How does the compression inlet limit the maximum pressure I can apply?

The compression connections are rated to the valve's 125 psi maximum working pressure, which caps the system pressure you can safely use.

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