fish-tank non-return-valve which way?

mollykins | 11:41 Wed 29th Jul 2009 | How it Works

7 Answers

i'm setting up my fishtank but don't know whic hway round to have the non return valve.

looking through the two holes in either end it looks like there is a filtering material of some kind (looks like a greyish fluffy mesh thing) is that the end that goes nearest the pump or attachtes to the lid?

Combi boiler wont fire up.

LED Parasol

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magicmerlin

Try blowing through it, you should be able to blow one way only. The water should enter via the end you can blow through.

Obvious init.

magicmerlin

Just thought, is non return valve for air flow. If so amend 'water' in second sentence to read 'air'.

mollykins

Question Author

oh yeah its seems obvious now. so the end i can blow through goes nearer to the pump.

ChuckFickens

I've never seen a one way/non-return valve that hasn't got an arrow on it to indicate the flow direction.

susan1958

I would have said there should be an arrow on it somewhere.

mollykins

Question Author

nope i've looked several times

magicmerlin

To put it in simple terms the direction you can blow through should match the direction of flow.

If you can't manage that get somebody to do it for you.

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