outside tap water pressure very low

[chenks]

i've got an outside tap that is fed from water inlet feed for the toilet sistern.
it works all OK except that the water pressure seems to be much much lower than the pressure from the sink tap in the bathroom (which is in the same room but opposite the toilet).
the little valve that shuts off the outside tap is in the fully open position.

can you advise if there would be any obvious reason why this is the case?

 

[stevetheplumber]

has the tap got a check valve inside they collect crud and block

 

[chenks]

a check valve?

 

[Ch4 plumbing]

Something might have fallen down the cavity and kinked that flexible tap connector your using!

 

[chenks]

is a solid wall, no cavity

 

[IDCHAPPY]

Possibly fed of the cold water tank? going through a flexi wont help much either as they are about 10mm bore....

 

[PlumbBobBob]

does the tap look like this with a little nut underneath

 

[chenks]

Possibly fed of the cold water tank? going through a flexi wont help much either as they are about 10mm bore....

we don't have a cold water tank (if we do it's not inside the premises - not even in the loft).
the flexi pipe will be no more than a couple if inches in length.

 

[R.Oak]

we don't have a cold water tank (if we do it's not inside the premises - not even in the loft).
the flexi pipe will be no more than a couple if inches in length.

I suspect the flexi is more like 300mm in length, however if it were only 50mm as stated it would still restrict the flow.

 

[chenks]

I suspect the flexi is more like 300mm in length, however if it were only 50mm as stated it would still restrict the flow.

definitely not 300mm, that would be 30cm and the thickness of the wall is nowhere near that.... the tap is attached to the outside of the wall direct to that flexi pipe.

it's dark outside now, so i'll go out tomorrow and take some pics of the tap etc.

 

[JCplumb]

the flexi is feeding the WC cistern, not the outside tap, so low pressure in the tap isn't being caused by the flexi. As above - the check valve in the tap is probably at fault, especially if it's been through a winter or two.

 

[JCplumb]

Oops!
just noticed the flexi going into the wall. I take back my above comment, that's pretty bad tbh.

 

[chenks]

Oops!
just noticed the flexi going into the wall. I take back my above comment, that's pretty bad tbh.

it's not 300mm long though!

 

[IDCHAPPY]

Oops!
just noticed the flexi going into the wall. I take back my above comment, that's pretty bad tbh.

Thought i was going mad for a minute 😉

 

[chenks]

i'm find it hard to participate in this conversation due to all my posts requiring moderation.
i shall check in the morning and provide an image of the tap and a close image of the pipe thru the wall.

 

[plumben]

The low pressure will be from that flexi
May I suggest re piping in 15mm
Sleeve the pipe through the wall
And fit a ISO/service valve then a double check valve on the inside

 

[R.Oak]

i'm find it hard to participate in this conversation due to all my posts requiring moderation.
i shall check in the morning and provide an image of the tap and a close image of the pipe thru the wall.

Ok, thats a good idea.

It may well be a couple of different things which result in low pressure. That flexi is one of them, even if it were 10mm long it would still restrict the flow.

It could also be a non return valve within the tap, a kink in the flexi and even just the condition of the tap itself. For the cost of a new tap (which is minimal) it may be worth changing that first and seeing if it makes much difference.

 

[Stanios]

Well they dont call them tap connectors for nothing. Plus its already sleeved with metallic mesh. It makes perfect sense!