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The Merlin SSSS is a shortened stainless steel spring designed for use with winter safety covers on pools where deck width or anchor spacing is limited
Fits Hayward multiport valve models such as SP0710
Address low flow conditions early—many heater issues are caused by restricted circulation
Use SCALEfree® upon filling a new pool
Pentair MasterTemp 125 Thermal Regulator | 474989 Pool Pumps The Merlin SSSS is aPentair Thermal Regulator for MasterTemp 125 Heater Water System 474989 The Pentair 474989 Thermal Regulator is an OEM replacement temperature regulating valve used in the MasterTemp 125 heater water system. It helps the heater maintain proper internal water temperature and flow characteristics during operation, supporting stable heating performance and helping protect internal components. Key Features OEM thermal regulator: designed to match the
US$ 2500.00
US$ 1999.50
US$ 2999.50
