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Old 06-29-2023, 08:23 AM   #15
Bigdav160
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Join Date: Apr 2011
Location: Klein Texas
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Re: Correct Heater House Routing - Vortec 350

Quote:
Originally Posted by 54blackhornet View Post
Can you explain the H fitting ?
Looks like it lets water exit the head/intake and return to the water pump.

A bypass is needed to keep water flowing when the thermostat is closed. Not needed once the thermostat is open.
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