Replacement Part Number:
In order to let customers find the model quickly, this product replaces the original model 77707-0010 & 38000-0007S.
As time goes by, thermal regulator will be damaged, rusted and lose its function due to long working hours. At this time, you need our New thermal regulator to replace it to restore its working performance and make it safer.
Applicable Models:
compatible with Pentair Mastertemp pool spa heaters 125/ 200/ 300/ 333/ 400
compatible with Pentair Sta-Rite Max-E-Therm pool spa heaters SR200/ SR333/ SR400.
(NOTICE: Please properly verify the Year/Make/Model before purchasing this product, in avoid of unnecessary charges. )
Easy to install:
Simply unscrew the existing the cap.
Pull out the old pentair thermal regulator.
Push the new 77707-0010 thermal regulator in.
Put the cap back on thermal regulator spring.
Function:
Generally speaking,the thermal regulator start open when the water heated to about 150F.
It may need to replaces the thermal regulator if it opens too high or too low.Perfect thermal regulator replacement for Pentair MasterTemp 400 & Sta-Rite Max-E-Therm 400 etc was short cycling (cycling on within one or two minute, then off for about 1 minute,then do the same and repeat)