Stainless steel flexipipe vs nylon braided

[AliG]

Thanks.

 

It is very rare any standards get mentioned or the grade of stainless steel.

[Tennentslager]

This is Spain. There's a sticker on each pipe but don't know what it says...everything easy to get to

[Tennentslager]

Spanish mate says 

Inspect annually or replace

 

 

Don't put behind a wally willy

[AliG]

For people interested in the serviceability of these hidden cisterns.

 

This one has also had a dodgy flush valve that sometimes kept running if you didn't push the flush plate long enough.

 

I had put off fixing it assuming it would be a pain to do.

 

I bought a new flush valve as I had disconnected it anyway to fix the pipework.

 

It took roughly five minutes to replace the flush valve. You literally just pull it out and push the new one in. It bends to fit through the flush plate hole. Taking off the front plate and putting it back n tight actually took longer than replacing the flush valve. It was an unusual instance of a job actually being as easy as it was supposed to be.

 

 

 

[S2D2]

Having just discovered a leaking flexi pipe on a toilet cistern, what is the general consensus on best practice here? Replace and set a 10 year reminder or fit something like https://www.screwfix.com/p/hep2o-plastic-push-fit-angled-tap-connector-15mm-x-1-2-/3036f to the cistern and go straight into plastic pipe, even if that involves a couple of elbows?

 

This is all inside a vanity cabinet so not something that can regularly be inspected, it needs silicone cutting back from the toilet to even see. 

[crispy_wafer]

I didnt have a great deal of success with those fittings, I'm sure they are fine but this ham fisted eejit had a failure on the washer.  I used the 1/2" to 15 female coupler with a street elbow instead.

[Nickfromwales]

2 hours ago, S2D2 said:

Having just discovered a leaking flexi pipe on a toilet cistern, what is the general consensus on best practice here? Replace and set a 10 year reminder or fit something like https://www.screwfix.com/p/hep2o-plastic-push-fit-angled-tap-connector-15mm-x-1-2-/3036f to the cistern and go straight into plastic pipe, even if that involves a couple of elbows?

 

This is all inside a vanity cabinet so not something that can regularly be inspected, it needs silicone cutting back from the toilet to even see. 

I use these regularly, very reliable bits of kit for concealed toilets / showers / wall mounted basic taps etc. 

 

2 hours ago, crispy_wafer said:

I didnt have a great deal of success with those fittings, I'm sure they are fine but this ham fisted eejit had a failure on the washer.  I used the 1/2" to 15 female coupler with a street elbow instead.

Did you swap the square edged rubber seal for the chamfered one? 
 

@S2D2, it doesn’t say it, but these come with a second loose rubber seal, and you simply switch to the one that matches the application; square for a traditional tap aka ‘flat-faced’, or chamfered if its a cone fitting (that takes an olive usually).

 

Don’t use anything like lube or paste on these, just whack them in dry and you’ll be right for life. 

[crispy_wafer]

2 hours ago, Nickfromwales said:

Did you swap the square edged rubber seal for the chamfered one? 

Probably not...  Application was both gerberit, and grohe cisterns...

[S2D2]

6 hours ago, crispy_wafer said:

I didnt have a great deal of success with those fittings, I'm sure they are fine but this ham fisted eejit had a failure on the washer.  I used the 1/2" to 15 female coupler with a street elbow instead.

Immediate failure or at a later date?

 

Thanks both, parts ordered.

[SimonD]

6 hours ago, Nickfromwales said:

or chamfered if its a cone fitting (that takes an olive usually).

I use these nowadays, far more reliable with cone fittings:

https://directplumbingsupplies.com/product/bonfix-insert-brass-with-o-ring-15-mm

[crispy_wafer]

3 hours ago, S2D2 said:

Immediate failure or at a later date?

 

Thanks both, parts ordered.

Straight away, so likely my fault, or has been pointed out the wrong washer used!

[Nickfromwales]

3 hours ago, SimonD said:

I use these nowadays, far more reliable with cone fittings:

https://directplumbingsupplies.com/product/bonfix-insert-brass-with-o-ring-15-mm

Does that convert you from cone to flat-faced?

[S2D2]

On 28/07/2026 at 13:34, Nickfromwales said:

I use these regularly, very reliable bits of kit for concealed toilets / showers / wall mounted basic taps etc. 

 

Did you swap the square edged rubber seal for the chamfered one? 
 

@S2D2, it doesn’t say it, but these come with a second loose rubber seal, and you simply switch to the one that matches the application; square for a traditional tap aka ‘flat-faced’, or chamfered if its a cone fitting (that takes an olive usually).

 

Don’t use anything like lube or paste on these, just whack them in dry and you’ll be right for life. 

Have to say, I'm having the same issue as @crispy_wafer, doesn't seem to be a way to stop it leaking attaching to a plastic cistern feed with the flat washer as per a flexi pipe.

 

Takes a brass stop end with the tapered washer with zero issues, but flat washer and cistern, nope. Starting to suspect I might have loosened something in the cistern messing about with it but that'll be a full disassemble of the unit to confirm.