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KCT

Weir And Pipework Help Please

H I'm installing a weir and pipework and need to ask some advice.

Firstly I see some weirs with top comb entry only others have botom and middle slots.

What is best and why please? The comb I want to use on the top is 25mm high should the flow cover this completely?

With the pipework I have one 32mm and one 20mm to use.  Am I right in thinking the larger pipe is the main return and has a u bend which ends at he min tank level when sump is full and the second is positiond just below the surface level.

Thanks for reading

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No. 

 

Your return should be the smaller pipe. Go with 2x 32mm drains, one slightly above the other if durso setup and if using a single weir and a 25mm return. What type of drain are you planning, twin durso, bean animal, herbie? All have their merits.

 

Having a slot in the weir below water level will prove troublesome should you need to drain your weir so I would go with top only. The water level in your tank should be below the tips of the weir comb and flowing through the comb rather than over it.

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No.

 

Having a slot in the weir below water level will prove troublesome should you need to drain your weir so I would go with top only. The water level in your tank should be below the tips of the weir comb and flowing through the comb rather than over it.

I think he means the acrylic wiers that have glass behind them. My old tank was done like this. Basically glass siliconed down then have a acrylic wier 10mm in front of the glass with slits top and bottom no idea why it was done this way but I think that's what he means.

 

 

 

Sent from my s6 using Tapatalk

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Thanks both. I have one 32mm and one 20mm connection.

Sorry which one would be the main drain and how far below water level, and the other just breaking the water level? 

I will def go for top flow only on weir

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I have looked at all 3 types only went towards durso because i have had pipework for that already, came with the sump

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Is one better for the hole sizes I have? Shouls have put all that on one post.

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Some people make the weir out of glass then stick the acrylic onto it because they think glass bonds to the tank stronger than acrylic. I just siliconed my acrylic box straight to the glass and have had no problems so far

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I've got glass weir in the corner with black acrylic against it purely for aesthetics as far as i can see and some adjustable combs on the top. I'm using the Herbie method and it works great for me. Not had a problem yet and its drained a few times and I've also had a pump failure :)

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