No, this is built into the pump. This is what the manual say's.
"The built-in bypass valve eliminates the need for an accumulator tank. Do not install in a system with an accumulator tank. The tank will interfere with the internal bypass valve."
Well I would have to say, fitting a tank was the best thing I did. So I am at a loss as to what the heck they are on about.
Just as an aside to Sonosailer, The manual also say's,
Failure to Prime:
1: Restricted intake or discharge line
2:Air leak in intake line
3
ebris in pump
4:Punctured pump diaphragm
5:Crack in pump housing
Oh and why do you have glycol in the system? Is this to stop freezing?? You mean it can get THAT cold there???? Yikes you guy's need to move! So what about getting the glycol out of the system again? I mean, wouldn't it taint the water and isn't it poisonouse??
Wheels