Weak flush

[L05tB0y]

Hi all, im new here so go easy. Im not a plumber but ive done lots jobs over the years involving some plumbing.
Ive just instaled a bathroom for my mother and all went well apart from the back to wall toilet i installed in a vanity type unit from B&Q.
The problem is when you press the twin flush buttons (either one) the water doesnt seem to come out with enough pressure to even flush away a bit of toilet paper. The water fills to the Max. line in the cistern but dont seem to flush hard enough.
Is their something ive done wrong or can i fix this.
Thanks Dave:wink_smile:

 

[glenno1]

Can you post a pic of tthe valve

 

[L05tB0y]

I will be going to my mothers at the weekend as i live away from her. Also i will try and get the camera in as its in a unit and the top of the cistern is quite near the top. So i will see what i can do at the weekend. Thanks.

 

[woodsy]

Main things to check are that flush pipe is not blocked - obvious but you would be surprised how many times a small piece of plastic etc is stuck down there or in entrance to pan

 

[L05tB0y]

No it seems to flush ok but not enough preassure and it seems to be a long slow flush if you know what i mean. Also it sounds quite noisy when filling back up again, but that maybe because its in a unit.

 

[jtsplumbing]

Did you get the cistern from B&Q ??

 

[L05tB0y]

Well i got the whole Bathroom suite from B&Q but the toilet set came from a company called PGH as did some other stuff.
It hasnt got a make on the cistern that i can see and the bloke i talked to from B&Q didnt know anything either.

 

[PlumbBobBob]

the bloke i talked to from B&Q didnt know anything either.

they never do

 

[L05tB0y]

What, they never flush, so whats the point of making and selling them. They want shot with ****.

 

[Jonwells]

You may need to take pan out, flush the cistern if possible in to a bucket, see how it flows then, if cistern empties quicker than when connected to pan, either flush pipe connection on pan is blocked or as I have come across, casting problem in pan flush pipe connection, restricting flow.
Replace pan. Jon

 

[PlumbBobBob]

What, they never flush, so whats the point of making and selling them. They want shot with ****.

no the people in b&q don't know anything

 

[puger]

hi dave make sure the pipe between the cistern and the pan is on a slight angle or straight if its falling back it can slow the flow
tommy

 

[JCplumb]

hi dave make sure the pipe between the cistern and the pan is on a slight angle or straight if its falling back it can slow the flow
tommy

Nah not really unless it's at a ridiculous angle. I'm guessing this is close coupled too so not a worry.
This case has a massive under-flow of water, it would take more than a slight gradient to slow the water down so much.

 

[kay-jay]

Nah not really unless it's at a ridiculous angle. I'm guessing this is close coupled too so not a worry.
This case has a massive under-flow of water, it would take more than a slight gradient to slow the water down so much.

More likely to be a low level on a btw wall pan Joe

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[kay-jay]

To the op...when you flush does the full volume of water leave the cistern? If it does and flush is poor, remove pan from stack and flush in a bucket If its still poor then its the pan if its ok its the stack/drains. Did you block stack with a plastic bag to stop smells when ripping out old bog? And if so did you remove this....

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[JCplumb]

More likely to be a low level on a btw wall pan Joe

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True, I missed the btw part, was thinking B&Q usually = cc, there are some cc btw's but not common.
I still stand by the angle thing though🙂

I recommended you to a customer who wanted a boiler repair on Monday - did you get it?

 

[kay-jay]

Not heard anything mate. But thanks.

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[L05tB0y]

Ok been to my mothers this weekend, i took the pan off and theirs no blockage. I totaly forgot to flush it into a bucket, but the flush seemed to work when i put some toilet paper in. One thing i noticed was the outlet holes in the pan were all different sizes, (just by feel) some holes seemed to be approx 5mm wide and some only felt about 2mm. Is this normal.
Ive got a few pics but i cant figure out how to post them 😕

 

[Dannypipe]

Yeah this can be normal. Toilet pans all vary. Some just have one large hole at the back, others large holes front and back, some with holes all around the underside of the rim. There is no hard and fast rule.

I find the best flush comes from the straight forward large hole at the back of the toilet.

You need to take the loo off the wall by the sounds of things and check everything out. How quickly the cistern discharges when it's standalone (into a bucket), and whether there is a blockage on the soil pipe work (carrier bag pushed into it to prevent smells and forgotten). You also need to feel into the top of the pan, where the donut washer fits, to see if you can feel anything that would block the loo.

Finally some toilets just don't flush as nicely.

Cisterns have come down in size a lot over recent years. To conserve water.

I fitted a loo a few years back. Low level, with the holes under side of the rim as you mentioned.

The client complained of poor flush. I thought it was OK but checked everything. Still she complained and in the end got a rep from the company to come round. Who agreed with me that the flush was fine and as expected. My point was the client was used to her old cistern that flushed 12 litres of water and her new one flushed with half that amount. Either that or she just poo'd like a trucker.

 

[Jamie Plumbteq]

Hi there,

As an ex B&Q bathroom installer I had this problem a couple of times.

1) make sure the flush pipe connector is fully pushed in if it isnt then the rim will greatly restrict the flow
2) the casting is poor and restricts the flow, change the loo for another ( this is what im betting on as it was common with the B&Q pans).





Goodluck and keep us updated :smile5:

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