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First time fitting a cold water tank tomorrow. Some questions

View the thread, titled "First time fitting a cold water tank tomorrow. Some questions" which is posted in Bathroom Advice on UK Plumbers Forums.

armyash

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Hi guys

Fitting a 25 cold water tank tomorrow, taking out an old metal tank which looks as thought it is insulated with slabs of straw/hay. She had a leak in the loft last week, i went to investigate, obvious signs of water in the loft, metal tank with lots of rust inside and out. Time for a new tank.

The tank has 2 22mm outlets coming out next to each other, the overflow and then the cold in.

Is there specific measurement where i need to drill the holes for the outlets? what about the inlet?

It might sound stupid to ask but i'd rather get it right first time than get sent back to re-do it.

Thanks
 
Keep the outlets as far as possible away from each other. If it is a tank with segments (most are) then use one outlet to one segment. Don't drill them near corners. Keep the outlet for hot tank above the height of the cold outlet so that hot will stop flowing first in the event of a drained cwt.
Put the ball valve to opposite side of outlets if possible - to suit any possible shower pump MIs.
Drill ball valve hole to suit tank support plate and keep overflow about same level or slightly lower.
Use lever valves if you are replacing valves.
 
Last edited:
Dont forget about the base of the tank, well supported not chipboard extended out past the tank by 150mm all the way round
Part 2 ball valve not part 1
25mm minimum from the bottom of the tank for cold water and hot water outlet 25mm above cold water outlet
FOV needs to be 50mm down from top of tank
Then overflow 25mm lover than fov
And water level 25mm lower than overflow well I should say warning pipe
350mm clearance from top of tank for maintenance
Primary outlet should be opposite side from inlet and secondary away from primary outlet
 
overflow should be 1 1/2 times inlet pipe diameter below fill valve so roughly an inch lower
fill valve should be opposite end to at least one of the outlets best to get push fit tank cons they never leak
 
Dont forget about the base of the tank, well supported not chipboard extended out past the tank by 150mm all the way round
Part 2 ball valve not part 1
25mm minimum from the bottom of the tank for cold water and hot water outlet 25mm above cold water outlet
FOV needs to be 50mm down from top of tank
Then overflow 25mm lover than fov
And water level 25mm lower than overflow well I should say warning pipe
350mm clearance from top of tank for maintenance
Primary outlet should be opposite side from inlet and secondary away from primary outlet
You quoting this from the c&g book by any chance??? 😉
 
All went ok, thanks for the advice. Getting the old tank out was a bit of a pig. Was an old metal one that had 1951 printed on the side. Luckily she had 2 guys working there repairing her porch who she made help me get it out. I had to take the loft ladder off and there was a beam running above the loft hatch. No space in the loft to leave it either.

New tank went in ok, bit of re-jigging on the pipe work, probably not a work of art but it was correct. £10 tip too. Done ok for tips recently probably had about £90 in 2 weeks.
 
I need to speak to my boss as I've had 3 offers now but refused them due to them being rented tenants and big contracts.. Just didn't feel right at the time but now I'll happily take what I can get
 
I need to speak to my boss as I've had 3 offers now but refused them due to them being rented tenants and big contracts.. Just didn't feel right at the time but now I'll happily take what I can get

What`s there to speak about, a tip is a tip and you are doing the work not your boss.
 

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