Plumbing Question

[Mark A]

Hi chaps, I have a question regarding pan connectors.

To avoid core drilling a separate hole through the wall for the basin waste I would like to plumb it in with the toilet, either with a strap on boss fixed to the 110mm pipe through the wall, or a pan connector with boss. Would this setup cause siphoning issues with a standard basin trap, and if so, would an anti-siphon trap sort the potential problem?

Cheers,
Mark

 

[NazNomad]

The answer is... maybe.

It might cause a syphon, it might not. Mine is connected to the 110mm and I've never had a problem with it.

However, for the £3 differnce between a normal trap and an anti-syphon, I'd fit the latter for peace of mind, if I were to do it again.

 

[sunnybob]

fit the anti syphon

 

[Lons]

You need an anti syphon fitting especially if connecting into the pan connector, either a specific trap or you can buy those that fit seperately on to the 40mm waste pipe.

Check carefully that the heights are ok before using a bossed pan connector as you might not be able to get enough fall on the pipework.

Bob

 

[Mark A]

Thanks for the replies - anti siphon trap it is!

Access to the bottom of the soil pipe is narrow and awkward enough as it is, so anything to simplify the external pipework will help greatly.

Cheers,
Mark

 

[sunnybob]

Just so you know, you will get gurgling noises.

 

[Myfordman]

Istr a rule of min 200 mm between pan entry and strap on boss?

 

[Lons]

Istr a rule of min 200 mm between pan entry and strap on boss?

Not a rule as far as I know but good practice however you can buy pan connectors with the boss built in which rather contradicts everything,

 

[woodenstx]

I tend to go OTT and fit antisyphon traps or mid run vents on everything now. I found it helped damp the draining noise from the dishwasher and also for upstairs to protect the water seal on the sink/toilet etc.