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Author Topic: circulating pump - advice needed  (Read 37385 times)
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Posts: 21

« Reply #75 on: August 04, 2010, 09:38:26 PM »

For Martin W.          re. reply 73 Nov2009

Hi Martin, I revisited your comment recently and realised that i have a flaw in the system.
If the photo voltaic panel,or the 12v pump should break down, i don't have a system which would make the 240v pump kick in to take over.
My control system is Honeywell Smartfit y plan and i have a temperature sensor on the feed pipe to the cylinder ,10cm  from the solar panel.
Questions.    Can i set my present Y plan system to kick in the 240v pump if the 12v system fails, or will i need a different control system-- and which one should it be ?
Can anyone advise please?
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« Reply #76 on: May 29, 2019, 03:06:30 PM »

For anyone coming back to this thread I can report that the Davies-Craig (Bosch) EPB circulating pump lasted about 8 years in my system (which runs pretty hot (80-85) for much of the summer). It didn't actually die in the end it just got unreliable - some days it wouldn't start.

The very similar replacement I got from a different manufacturer only lasted 2 years (died last weekend) which is really rather shoddy.

I wonder what others long-term experience with automotive circulators vs mains pumps has been? I'm temped to splash out 150 on a low-power mains solar pump from Navitron in the hope that it will last more than a decade, and at least having standard pump flanges makes a replacement easier without having to drain down. The motor is relay-driven , so switching to mains doesn't really make much odds there.

What sort of lifetime are people getting on the mains pumps?

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