Outdoor Wood Furnace Info

All-Purpose OWF Discussions => Plumbing => Topic started by: uncle on October 04, 2013, 01:39:32 PM

Title: Check Valve in Pump Yes or No
Post by: uncle on October 04, 2013, 01:39:32 PM

My pumps have a check valve in the inlet. Do I keep them in or pull them out?
Do these effect the flow charactoristics of the pump?

Brian

Title: Re: Check Valve in Pump Yes or No
Post by: uncle on October 04, 2013, 07:07:51 PM

pump runs single loop from OWB to house heat exchanger.

Title: Re: Check Valve in Pump Yes or No
Post by: uncle on October 06, 2013, 08:06:00 PM

Thanks for the info.
Brian

Title: Re: Check Valve in Pump Yes or No
Post by: RSI on October 06, 2013, 09:17:47 PM

It does restrict flow a little. See flow for a Grundfos 15-58 below.
Also, it can cause the pump to get airlocked in certain situations so best to just remove it if it isn't needed.
(http://www.hpscontrols.com/curves/15-58%20-60.JPG)

Title: Re: Check Valve in Pump Yes or No
Post by: slimjim on October 07, 2013, 12:09:34 PM

Absolutely get rid of it on the wood boiler loop, get all the plastic out, if you bring your water feed in between 2 ball valves it allows you to fill the boiler from the supply or the return, thus pushing any air that is trapped back to the wood boiler and vented out the top

Title: Re: Check Valve in Pump Yes or No
Post by: uncle on October 07, 2013, 08:08:07 PM

I didn't think about that, Thanks

Brian