Mon, 25 May 2026 08:49:10 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18032&Focus=304331#Comment_304331 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18032&Focus=304331#Comment_304331 Wed, 22 Nov 2023 06:27:36 +0000 Charenteman
Is a non return valve an essential component to the return leg from the pump station to the collector?
My previous install had a NRV in the pump station itself but have just noticed that this is not a feature to the pump station spec to my latest install.
There is little sunshine here at the moment, but is the lack of a NRV going to cause a significant future syphonnage problem when the sun comes out?
Thinking of modifying if I have made a significant omission here ??.
Thoughts anyone?

Thanks]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18032&Focus=304332#Comment_304332 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18032&Focus=304332#Comment_304332 Wed, 22 Nov 2023 06:52:52 +0000 Charenteman https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18032&Focus=304333#Comment_304333 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18032&Focus=304333#Comment_304333 Wed, 22 Nov 2023 07:29:59 +0000 RobL https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18032&Focus=304335#Comment_304335 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18032&Focus=304335#Comment_304335 Wed, 22 Nov 2023 08:33:10 +0000 tony https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18032&Focus=304342#Comment_304342 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18032&Focus=304342#Comment_304342 Wed, 22 Nov 2023 13:21:48 +0000 revor