Burst internal supply pipe

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Gorners

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• 15 Aug 2017

• #1

Hi guys, just after some reassurance really. Just as I went to bed last night I heard a pop and water gushing under kitchen floor, internal stop tap did nothing, could not turn off outside stop tap (and not could the emergency plumber!!) so had to get the water board out who managed to shut it off after 2 hours - the water meter was literally rattling with the speed! Fortunately all the water stayed under ground.

Had another emergency plumber out today and after cutting away some floorboards under the internal stop tap to expose a load of push fits, when the water went back on the leak was actually a little further back under the floor which he identified as the internal supply pipe as it emerges from the ground.

I've took a photo and attached - can anyone specific exactly what this it, what has happened to it and is it a simple fix once they've took up a bit more of the floor? Luckily I have supply pipe cover and they're ringing me tomorrow to arrange a time for an engineer.

 

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Madrab

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• 15 Aug 2017

• #2

Well it looks like 25mm MDPE pipe with a (could be) philmac 25mmx22mm adapter going through a 3/4">22mm straight compression coupler (iron) to a grey 22mm HEP push fit elbow. It's certainly all easily replaceable unless the MDPE has burst at the base there's no supply pipe to work with. Even then though there should still be enough to work with after some persuading.

 

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terryplumb

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• 15 Aug 2017

• #3

can't tell from pic ,exactly what has failed ,but all pretty standard stuff. mdpe blue underground supply pipe ,some compression fittings and a mix of plastic and copper pipes. however the blue pipe should have your internal stopcock at the point where it comes into your property above floor level ,then everything continued from it to your house plumbing.

 

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Gorners

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• 15 Aug 2017

• #4

Thanks guys, sorry should have been more clear, the water is coming from between the (now identified) MDPE blue pipe and the black fitting above it.

If you zoom in you can actually see the o ring which I presume should be compressed between the two.

 

Last edited: 15 Aug 2017

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terryplumb

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• 15 Aug 2017

• #5

black pipe is a sleeve with blue inside it ,sounds like the blue mdpe is split ,if water is actually coming from the black sleeve. are you sure ?

edit , sorry missed read your post it's the fitting that's failed

 

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Gorners

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• 15 Aug 2017

• #6

terryplumb said:

black pipe is a sleeve with blue inside it ,sounds like the blue mdpe is split ,if water is actually coming from the black sleeve. are you sure ?

Click to expand...

Sorry, edited post after I realised I'd got mistaken!

 

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Gorners

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• 15 Aug 2017

• #7

So now I know what they are, if I'm looking at the right part on screwfix I could fix this myself for 3 quid (plus cost of making good the floor).

And I thought I was getting value out of the insurance

Thanks guys.

 

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terryplumb

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• 15 Aug 2017

• #8

ha ha, no worries. its a simple fix once flooring removed for access . close examination needed to determine the cause of failure .could be simple as the pipe stiffener inside the mdpe was not fitted ,fault in the plastic moulding of the fitting ,stress on the joint ,not tightened up enough , overtightend ,one cant tell these things from a picture .

 

Madrab

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• 16 Aug 2017

• #9

If it's 25mm MDPE and 22mm grey supply pipe then all that's needed is a 25mm>22mm compression elbow adapter, cutters and a couple of inserts.

 

Ian H

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• 16 Aug 2017

• #10

Or a 25mm elbow with an internal reducer to 15mm.

I thought you shouldn't have pushfit before your stop tap?

 

leakydave

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• 16 Aug 2017

• #11

Would a 25mm to 15mm or 22mm stop tap not be a better bet if you can cut an access panel in the floor?

 

Madrab

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• 16 Aug 2017

• #12

Ian H said:

I thought you shouldn't have pushfit before your stop tap?

Click to expand...

Yup, the water authority would normally have mentioned that but ultimately they don't really care what's after the meter as that's the user's side.

Possibly an extension or remodel and the mains stop tap has been moved??

 

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Gorners

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• 17 Aug 2017

• #13

To update, came out yesterday and took away the grey pipe completely, put in another piece of MDPE onto the existing coming out of the floor and fitted an elbow straight onto the copper pipe going to stop tap (I assume with an internal reducer).

All was well until a few hours later when the new elbow started dripping on the MDPE side and then turned into a trickle. The water is coming out where the pipe inserts into the elbow.

They're back out today!!

 

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Gorners

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• 17 Aug 2017

• #14

Madrab said:

Possibly an extension or remodel and the mains stop tap has been moved??

Click to expand...

Not while we've been in the house but I suspect the stop tap has been moved when previous owners did the kitchen about 4 years ago as the stop tap is nice and shiny!