Utility appliance waste

[vala]

Originally intended to stack washing machine and dryer so had plenty of on wall to tee off to sink and a standpipe for WM & TD. This would have allowed a 700-800mm pipe including trap.

However now the time has come to install, decision has been made to fit the appliances side by side. This has reduced the available space and now a seperate standpipe cannot be fitted.

 

I've read the reason standpipe are around 700-800mm, is due to discharge rate and allow drainage should the rate be slowed down for whatever reason.

 

If this is the case would it be ok to get that overall length of pipe, however have it at a 90° bend?

Maybe use a swept bend rather then a tight 90°?

[Nickfromwales]

3 minutes ago, vala said:

Originally intended to stack washing machine and dryer so had plenty of on wall to tee off to sink and a standpipe for WM & TD. This would have allowed a 700-800mm pipe including trap.

However now the time has come to install, decision has been made to fit the appliances side by side. This has reduced the available space and now a seperate standpipe cannot be fitted.

 

I've read the reason standpipe are around 700-800mm, is due to discharge rate and allow drainage should the rate be slowed down for whatever reason.

 

If this is the case would it be ok to get that overall length of pipe, however have it at a 90° bend?

Maybe use a swept bend rather then a tight 90°?

Can we have even a crap drawing of what you propose please? 2 beers in atm, which is good for me, and I'm still lost.

[vala]

23 minutes ago, Nickfromwales said:

Can we have even a crap drawing of what you propose please? 2 beers in atm, which is good for me, and I'm still lost.

 

Green line path of 40mm pipe.

red line possibly a running trap.

blue lines the drain hose from WM & TD.

 

everything unfortunately a lot tighter then I'd hope for due to the change from stacking to side by side.

[Nickfromwales]

[vala]

2 minutes ago, Nickfromwales said:

Thanks.

i should have mentioned I need a sink waste here as well.

so where the I tee'd off for the running trap, I was going to run the sink waste to there.

i'll measure up where you've drawn but off the top of my head that's probably about 300mm from the appliance spigot to the p trap.

would that be enough overall length of pipe?

[Nickfromwales]

5 minutes ago, vala said:

i should have mentioned I need a sink waste here as well.

Yes, you should have  

 

TRAP

 

Y branch (130 degree)

 

One of these in the side of the Y branch

 

300mm vertical drop is plenty, as the overall drop is to the invert of the 40mm meeting the black connector. Can you not take the black connector out and put a reducer where that goes into the floor?

[Nickfromwales]

[vala]

14 minutes ago, Nickfromwales said:

300mm vertical drop is plenty, as the overall drop is to the invert of the 40mm meeting the black connector. Can you not take the black connector out and put a reducer where that goes into the floor?

that black connector is for the toilet waste as well. From the ground is the 110mm pipe to the sewer. The black connector is 110mm to 90mm. The geberit pipe out of the toilet is 90mm as standard.

 

I've already had on order a reducer to 40mm, elbow and tee piece and this is being delivered on Monday, to come off from the yellow bung.

 

if 300mm is enough then I have a dual appliance spigot already here?

https://www.screwfix.com/p/mcalpine-twin-hose-connector-40mm/206hr
use this instead of tbh y branch?

Edited 13 hours ago by vala

[Nickfromwales]

4 minutes ago, vala said:

if 300mm is enough then I have a dual appliance spigot already here?

https://www.screwfix.com/p/mcalpine-twin-hose-connector-40mm/206hr
use this instead of tbh y branch?

Yes, but you may get a gurgle from the opposite appliance when the other is discharging as these create a seal vs the open pipe I suggest.

[vala]

6 minutes ago, Nickfromwales said:

Yes, but you may get a gurgle from the opposite appliance when the other is discharging as these create a seal vs the open pipe I suggest.

Noted.

The gurgle we experience currently with our existing set up in the kitchen which is using the same paperwork as was here before we bought the house.

this is a sealed spigot under the sink attached to the sink waste and the noise comes through the strainer.

i was hoping the air break in the top of these spigots would prevent that along with using a seperate standpipe.

 

thanks for your help on this!

Edited 13 hours ago by vala

[Nickfromwales]

27 minutes ago, vala said:

i was hoping the air break in the top of these spigots would prevent that along with using a seperate standpipe.

 

thanks for your help on this!

You may be ok, just giving a precaution.

[Gone West]

9 hours ago, Nickfromwales said:

Yes, but you may get a gurgle from the opposite appliance when the other is discharging as these create a seal vs the open pipe I suggest.

 

9 hours ago, vala said:

https://www.screwfix.com/p/mcalpine-twin-hose-connector-40mm/206hr

I used one of those Mcalpine hose connectors and mine had a hole in the top in the centre, which acted as an air break.

[vala]

30 minutes ago, Gone West said:

 

I used one of those Mcalpine hose connectors and mine had a hole in the top in the centre, which acted as an air break.

Yes, can confirm mine too has a hole in the centre of the top part.

 

to reduce wastage and returning items I'll use the parts I already had on order and will get the standpipe @Nickfromwales linked to. Will use the dual appliance spigot I already have.

as it's still a minimum of a month (most likely longer) till I finish making the last 2 units so I'll have some time testing it without any access issues if it needs to be changed to how @Nickfromwales suggested with the y branch.

Edited 3 hours ago by vala