Low level cistern to wc connection

[seanydee]

Hi,

I'm replacing a close couple wc with a concealed low level cistern & wc package. Due to the layout of the existing plumbing and the size of the cabinet that came with the cistern, i am planning on installing the cistern offset from the wc and making my own flush pipe using 40mm waste pipe from cistern going into a reducing 90 degree elbow into 32 mm pipe into 32mm 90 degree elbow into 32 mmm pipe into the wc, so that the final pipe goes in straight, as to use a one piece flush pipe would have it coming in at an angle and i'm not confident that i'd be able to get a seal. Is this an acceptable system? I may be able to wrangle things so that the cistern is in line with the wc and use a one piece flush pipe but it will take considerably more work, moving the existing incoming cold water pipework.
Also, is the anything i should use with the cone that connect the flush pipe to the pan to ensure a good seal?
Cheers

 

[chris watkins]

Much better off using 40mm waste pipe not 32mm as with the 90 bends it is going to slow the water down on the flush which may either cause a problem getting it to flush or to clear the contents away.
from memory you will have a problem getting a seal with either size of waste pipe into a flush cone so why not cut a piece of flush pipe to go into the pan & then use a 40mm McApine / multi fit elbow to connect to the waste pipe. I thing it was alright at the siphon end.
They don't teach that at a college / training centre !! LOL

 

[seanydee]

Much better off using 40mm waste pipe not 32mm as with the 90 bends it is going to slow the water down on the flush which may either cause a problem getting it to flush or to clear the contents away.
from memory you will have a problem getting a seal with either size of waste pipe into a flush cone so why not cut a piece of flush pipe to go into the pan & then use a 40mm McApine / multi fit elbow to connect to the waste pipe. I thing it was alright at the siphon end.
They don't teach that at a college / training centre !! LOL

Cheers Chris. I assume this is a better solution that using a flexible flush pipe?

 

[SimonG]

Hi,

I'm replacing a close couple wc with a concealed low level cistern & wc package. Due to the layout of the existing plumbing and the size of the cabinet that came with the cistern, i am planning on installing the cistern offset from the wc and making my own flush pipe using 40mm waste pipe from cistern going into a reducing 90 degree elbow into 32 mm pipe into 32mm 90 degree elbow into 32 mmm pipe into the wc, so that the final pipe goes in straight, as to use a one piece flush pipe would have it coming in at an angle and i'm not confident that i'd be able to get a seal. Is this an acceptable system? I may be able to wrangle things so that the cistern is in line with the wc and use a one piece flush pipe but it will take considerably more work, moving the existing incoming cold water pipework.
Also, is the anything i should use with the cone that connect the flush pipe to the pan to ensure a good seal?
Cheers

I'd be moving the cold water pipe as I would be concerned about the quality of the 'flush'

 

[chris watkins]

Cheers Chris. I assume this is a better solution that using a flexible flush pipe?

No, I have not seen a flexible flush pipe & to be honest as with most things flexible I don't think I want to, give me a bit of rigidity every time !!! :wink5:

 

[dancinplumba]

you can get 1 1/2 flexible pipe which you can use if you want to seanydee

 

[seanydee]

cheers guys. i'm going to get a flexi pipe and the adaptors/rigid pipes and give both a go, see which one i'm happiest with, failing that i'll move the supply

 

[chris watkins]

cheers guys. i'm going to get a flexi pipe and the adaptors/rigid pipes and give both a go, see which one i'm happiest with, failing that i'll move the supply

Your not trying to please everyone by-chance, are you seanydee ?? LOL
(a flexi will end in tears mark my words)

 

[REDSAW]

as said it wont work with 90 elbow, why, because i have tried the same way your proposing (live n learn lol).

wangle one of these but with a double spiggot...or use 45 degree bends

 

[seanydee]

cheers redsaw. i've located a double spigot one at b&q so i'll try both and see which has best pressure

 

[PlumbBobBob]

wouldn't it be cheaper to just move the water supply?

 

[dancinplumba]

Your not trying to please everyone by-chance, are you seanydee ?? LOL
(a flexi will end in tears mark my words)

Why ??