Proper Accumulator Tank Pressure

Dutch_12078 wrote:

ScottG wrote:
Mr. E, please let us know how this works out for you. I have the same pump and have been considering adding an accumulator to smooth out flow but not sure how it will work with these bypass pumps. (Manufacturer just says "not needed").

The accumulator will work ok with a bypass pump. The manufacturer is correct that it's not needed for the low flow pump cycling that occurs with non-bypass pumps, but it still works well for cutting down on how often the pump runs. I have a 2-gallon accumulator installed with a SHURflo Revolution bypass pump, and we can often make it through the night with typical old folks bathroom visits without the pump running at all.

Good info - thx! What did you set the tank pressure to?

The reasons for -2 DP and 0 DP are in my previous post. Setting the pressure at zero or slightly less all depends on how fussy you want to get. Zero will give you the maximum draw down and -2 will allow for slight pressure switch variations and make sure the pump always cycles the way it should. You just have to outsmart your bladder!! Haha!

I pumped mine up to 40psig to go with a 55 psig pump/system. And I didn't really think it all that easy to connect the dots in the manual........

Well I called Shurflo today, hard to find their number, but it's 1-800-834-3218, keep it in your phone.

According to the tech, if you have the 4008 pump, as stated the turn on pressure is not the re-start presure and he didn't know why the manual for the pump doesn't clearly state it.

The turn on pressure for that pump is 38 psi, so the accumulator pressure should be set at 38 psi.

I think someone did come to that same conclusion, but I thought I'd double check.

Cheers,

Mr. E