Dead leg in bathroom

[Wibblyp]

I have a first floor flat that I am doing a refit in . The current wc is plumbed using 10mm jg. The bath is being replaced with an electric shower . There were originally 2 drain offs on vertical’s for the bath and one drain off on the 10mm vertical for the wc. All other pipe work is 15mm speedfit. If I were to do away with the 10mm wc connection, I would be left with a dead leg in excess of 2m. I cannot start pulling the original ceiling down . Can I combine the old 10mm and new 15mm feeds to both shower and toilet with a single drain off to avoid this dead leg ?

cheers
paul

 

[ShaunCorbs]

Can you draw it out eg picture ?

 

[Wibblyp]

Can you draw it out eg picture ?

Bit old school, no smart phone etc . No pics . It was a standard 1700 bath with the wc at the head end . It’s being replaced with a 1700 tray on a raised plinth. The 10mm comes down the metsec wall about 300mm from head of the bath, the 15mm hot feed at the tap end of the bath has been blanked . My proposal was to extend the 15mm cold from the tap end to the wc, combining it with the existing 10mm feed to the wc to prevent the dead leg, with a single drain, discretely hidden at the end of the shower plinth. This indicates a maximum dead leg length of 150mm. Got to cook dinner but wll investigate drawing a diagram after said .

 

[ShaunCorbs]

What system do you have eg combi boiler cylinder etc ?

 

[Wibblyp]

Apparently I need an iPad pen , sounds boring .

What system do you have eg combi boiler cylinder etc ?

unvented system.

 

[Wibblyp]

Not sure of cylinder size, single bloke living there on his own with no intention of changing .

 

[Wibblyp]

Perhaps this helps, sorry for the drawing. Top is existing bottom is proposed . Joining existing 10mm to wc with a tee to new 15mm from shower Hence a single drain off .

 

[ShaunCorbs]

Yes you could do that but it all depends where the existing bath is fed off if it’s off the unvented cold this will be at a lower pressure maybe than the toilet supply tbh it’s a short run I would cap it off as close back as you could possible

 

[Wibblyp]

pretty sure both the toilet and bath are fed from the unvented as both supply’s are dropping down from the ceiling void .

 

[Wibblyp]

The toilet fills at a very slow rate also .

 

[Ben-gee]

That could just be a bit of grit in valve or a dodgy diaphragm.