Self Cutting Drain & water fittings.

[stearman65]

I plan to use these on my dishwasher installation. Anyone had any problems with them, the drain fitting has a non return valve.
Stearman65.

 

[ShaunCorbs]

Yes don't use them for a start the water connection doesn't allow full flow, and the waste they block after time

Either do it properly or get someone in to do it

 

[stearman65]

Yes don't use them for a start the water connection doesn't allow full flow, and the waste they block after time

Either do it properly or get someone in to do it

I suppose the blocking comment depends on how clean the pots are before they go in the D/W? Ours are swilled first.
Stearman65.

 

[Riley]

It's not just food waste. Soap scum and grease will also cause blockage over time

 

[oz-plumber]

It's not just food waste. Soap scum and grease will also cause blockage over time

Probably more so in the non-return valve part of the waste fitting.

 

[macackau]

The self cutting valve for the water supply may not provide enough water flow to the dishwasher, they only cut in a very small hole and it may tester the amount of water the dish washer needs. Get some one to do it for you or do it properly with a washing machine valve and properly cut in section of waste pipe.

 

[plumben]

The self cutting valves for water are useless,
And if its easy enough just fit proper stand pipes for the wastes

 

[stearman65]

The D/W uses 6.5L per complete cleaning cycle, with 3 fills per average cycle, at 2.16L per fill. So it doesn't need much flow. It would mean ripping the kitchen units apart to get at the pipework behind the back panels, so this is the lesser of the two evils. The installation is part way through, I'll let you know how things go. Incidentally I've used 4 self cutting 15mm valves for dish washers & washing machines over the last 20 years, never had any problems. This is my first self cutting drain, unfortunately the existing drain fittings are glued not compression.
Stearman65

 

[Chalked]

On pic 5 you need to turn the waste so it drops down, not up.

 

[macackau]

You're trying to push the waste up in to the self cutting waste. Spin it 180 degrees so the wate is being pushed down it. It will block otherwise.

 

[macackau]

Chalked was too quick!

 

[stearman65]

I didn't do this a "plumber" did. The DW manual shows the drain run as being level with the outlet if possible. The drain fitting spigot has an NRV to prevent back flow & smells.
Stearman65.

 

[Dotty]

Yes don't use them for a start the water connection doesn't allow full flow, and the waste they block after time

Either do it properly or get someone in to do it

It's not just food waste. Soap scum and grease will also cause blockage over time

Probably more so in the non-return valve part of the waste fitting.

The self cutting valve for the water supply may not provide enough water flow to the dishwasher, they only cut in a very small hole and it may tester the amount of water the dish washer needs. Get some one to do it for you or do it properly with a washing machine valve and properly cut in section of waste pipe.

The self cutting valves for water are useless,
And if its easy enough just fit proper stand pipes for the wastes

This is one of them threads where the op is going to do what they want and ignore the advice they asked for...

Makes you wonder why we bothered spending years and a small fortune getting qualified, doesn't it. ...

 

[Dotty]

You can easily cut in to and adapt existing fittings. Look at the mcalpine range of fittings.

 

[stearman65]

You really should read all the thread, I'm not doing the installation, a "Plumber is"!!!

 

[SimonG]

That dishwasher looks similar to pub glass washers which tend to have gravity waste rather than pumped waste.

 

[stearman65]

If it's easy, why didn't the "plumber" do that?

 

[ShaunCorbs]

Also don't think self cutting valves were around 20 years ago 😀

 

[stearman65]

I'm sure I just posted this, but it seems to have disappeared, I'll try again "If it is easy why didn't the "Plumber" cut into the existing drain?

 

[stearman65]

Want to bet?

 

[stearman65]

Want to bet?

Also don't think self cutting valves were around 20 years ago 😀

 

[ShaunCorbs]

How much did you pay said plumber and he wasn't from where you bought the appliance was he ?

 

[stearman65]

Just read the manual again, it states under technical problems (the drain pump is not working, anti flood system has operated, disconnect from mains, disconnect water inlet, call qualified technician.

That dishwasher looks similar to pub glass washers which tend to have gravity waste rather than pumped waste.

 

[stearman65]

Haven't payed him yet, no he wasn't from Currys where the DW came from.

How much did you pay said plumber and he wasn't from where you bought the appliance was he ?

 

[Chalked]

Just read the manual again, it states under technical problems (the drain pump is not working, anti flood system has operated, disconnect from mains, disconnect water inlet, call qualified technician.

It won't push past the non return or the upwards facing loop.

I'm not sure what your on here for. Are you asking what the "plumber" did is wrong.or how it can be rectified? Either way, you are good at getting people on your side to help :hand: