this Williams temperature controller uses modern mechanical switching that complies with all environmental regulations regarding heavy metals

Quick Connect Terminals: Features standard 1/4 inch spade terminals for efficient field wiring and reduced downtime during replacement

this kit simplifies the replacement of HVAC expansion valves by providing exact-fit hardware that eliminates the need for field-improvised sealing methods

Direct Replacement: Engineered as the precise AP13155-2 replacement for AP13155-1

providing a professional

Siemens Building Technology 257-02070B Valve Assembly 321894-708 this Williams temperature controller usesFor high performance hydronic system management, the Siemens Building Technology 257 02070B Valve Assembly provides unmatched precision in temperature control applications. This assembly features the Siemens Powermite 599 MT Series 3 way mixing valve body, constructed from professional grade forged brass with reliable brass trim. Contractors specify this unit for its robust ANSI Class 250 rating, ensuring long term durability in high static