{"product_id":"pentairwaterpoolandspainc_474327z","title":"Pentair Thermostatic Expansion Valve | UltraTemp Heat Pump | 474327Z","description":"\u003cp\u003eThe Pentair Thermostatic Expansion Valve (474327Z) is the OEM replacement expansion valve for the UltraTemp Heat Pump Models 140 and 140HC.\u003c\/p\u003e\n\n\u003cp style=\"background-color: #fff3cd; border: 2px solid #FFEAA7; padding: 15px; border-radius: 5px; margin: 15px 0; color: #856404;\"\u003e\n\u003cstrong\u003e⚠️ IMPORTANT: HEAT PUMP REFRIGERANT COMPONENT — PROFESSIONAL SERVICE REQUIRED\u003c\/strong\u003e\u003cbr\u003e\nThe thermostatic expansion valve is a refrigerant-circuit component. Gas and electrical heat pump components must be serviced by a licensed pool professional or qualified HVAC technician. Do not attempt to service refrigerant-side components without proper certification and EPA Section 608 refrigerant handling credentials.\n\u003c\/p\u003e\n\n\u003cp\u003eThe thermostatic expansion valve (TXV) meters refrigerant flow into the evaporator coil, regulating the rate of expansion to maintain optimal heat transfer efficiency across the refrigerant circuit. A failed or out-of-calibration TXV results in reduced heating output, compressor overload, or frost accumulation on the evaporator — symptoms that indicate the valve is no longer controlling refrigerant superheat correctly. This is the correct OEM replacement for UltraTemp 140 and 140HC heat pump models.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 20px 0; border: 1px solid #ccc;\"\u003e\n\u003ctr style=\"background-color: #f8f9fa;\"\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003ePentair Part Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e474327Z\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003ePart Name\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eThermostatic Expansion Valve\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f8f9fa;\"\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eQuantity Included\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eEach\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eFits Into\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 20px 0; border: 1px solid #ccc;\"\u003e\n\u003ctr style=\"background-color: #f8f9fa;\"\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eEquipment Line\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eModel \/ Part Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eNotes\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003ePentair\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eUltraTemp Heat Pump — UltraTemp Series\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e140\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eModels 140, 140HC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f8f9fa;\"\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003ePentair\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eUltraTemp Heat Pump — UltraTemp Series\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e140HC\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eModels 140, 140HC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003cp\u003e\u003cem\u003eCompatibility is based on Pentair parts documentation and available OEM records. This is not an exhaustive list. For certainty, verify the part number in your equipment's manual or on the original part itself before ordering.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003ePro Tip\u003c\/h3\u003e\n\u003cp\u003eBefore ordering, confirm your UltraTemp model number from the rating label on the unit — the 140 and 140HC share this valve, but verify the label matches one of these two models. TXV replacement requires recovering and recharging the refrigerant circuit; this work must be performed by a certified HVAC or pool heating technician with EPA Section 608 credentials. Do not attempt to replace this component without proper refrigerant handling equipment and certification.\u003c\/p\u003e\n\n\u003c!-- wft:processed:manual:2026-04-06 --\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":53971919077651,"sku":"474327Z","price":253.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0920\/0687\/5411\/files\/pentair-thermostatic-expansion-valve-ultratemp-heat-pump-474327z-1.webp?v=1789765056","url":"https:\/\/poolaroo.com\/products\/pentairwaterpoolandspainc_474327z","provider":"Poolaroo","version":"1.0","type":"link"}