Valve for 32mm waste pipe - such a thing exist?

[reds42]

I'm looking at the possibility of installing a saniflush toilet (combined loo and macerator) in my somewhat frail parents house, and it would be nice to put a service valve on the probable 32mm solvent weld waste pipe close to the toilet to allow easier maintenance. Having a glance at the saniflush fitting diagrams they seem to suggest a waste pipe isolation valve, and I'd think that it could well come in handy, but I can't find anything suitable. Does a valve like that actually exist?

I know... I know... Macerators are a terrible invention... It will break at some point and be unpleasant to fix... But my parents live in an upside down house built on a slope with the bedrooms downstairs, the bathroom upstairs, and the main sewer level is above the downstairs floor level so pumping is inescapable. The idea is that when they need the pee in the night they wouldn't have to mess around on the stairlift to get upstairs.

 

[just pumps]

PVC Ball Valve Solvent Weld To Suit 20/25/32/40/50/63/75/90/110/160mm Pipe | eBay

Find many great new & used options and get the best deals for PVC Ball Valve Solvent Weld To Suit 20/25/32/40/50/63/75/90/110/160mm Pipe at the best online prices at eBay! Free delivery for many products.

www.googleadservices.com

PVC Ball Valve Solvent Weld,For 20/25/32/40/50/63/75/90/110/125mm Water Pipe | eBay

Find many great new & used options and get the best deals for PVC Ball Valve Solvent Weld,For 20/25/32/40/50/63/75/90/110/125mm Water Pipe at the best online prices at eBay! Free delivery for many products.

www.googleadservices.com

 

[reds42]

PVC Ball Valve Solvent Weld To Suit 20/25/32/40/50/63/75/90/110/160mm Pipe | eBay

Find many great new & used options and get the best deals for PVC Ball Valve Solvent Weld To Suit 20/25/32/40/50/63/75/90/110/160mm Pipe at the best online prices at eBay! Free delivery for many products.

www.googleadservices.com

PVC Ball Valve Solvent Weld,For 20/25/32/40/50/63/75/90/110/125mm Water Pipe | eBay

Find many great new & used options and get the best deals for PVC Ball Valve Solvent Weld,For 20/25/32/40/50/63/75/90/110/125mm Water Pipe at the best online prices at eBay! Free delivery for many products.

www.googleadservices.com

Yeah I saw those, but one of the reviews say they don't fit 32mm UK waste pipe. I'm assuming that those valves have a 32mm internal diameter, but the external diameter of 32mm waste is more like 36mm I believe.

EDIT might not be quite 36mm, but its more than the 32mm internal diameter of waste pipe.

 

[just pumps]

Yeah I saw those, but one of the reviews say they don't fit 32mm UK waste pipe. I'm assuming that those valves have a 32mm internal diameter, but the external diameter of 32mm waste is more like 36mm I believe.

EDIT might not be quite 36mm, but its more than the 32mm internal diameter of waste pipe.

Ask the seller to be sure then. The one reviewer could have tried push fit pipe instead of solvent weld pipe for all you know which is different.

 

[Rodders53]

Anything on this random website of any use? https://www.gasandwaterpipelines.co.uk/category-6103.html

I'm no expert on waste pipe sizes and such.

 

[reds42]

Ask the seller to be sure then. The one reviewer could have tried push fit pipe instead of solvent weld pipe for all you know which is different.

I've shot them a message to see what they say, but found identical looking ones somewhere else that specified 32mm was the internal dimension on the valve ends so would need 32mm od pipe.

Anything on this random website of any use? https://www.gasandwaterpipelines.co.uk/category-6103.html

I'm no expert on waste pipe sizes and such.

I suppose another alternative would be to not use standard waste pipe and just plumb it out entirely out of that pipe system.

 

[Madrab]

Look at PVC pipe and fittings. Lots of valves and pipe that would probably suit. The transition may be the harder part but a compression coupler may be able to handle that.

PVC Metric Plumbing Fittings Pipe For Aquarium Fish Tank Pond Solvent Weld | eBay

Find many great new & used options and get the best deals for PVC Metric Plumbing Fittings Pipe For Aquarium Fish Tank Pond Solvent Weld at the best online prices at eBay! Free delivery for many products.

www.ebay.co.uk

 

[reds42]

Seems somewhat suprising given the number of macerators that must be out there that no one makes a valve for standard size uk waste pipe. Must be a lot of macerators that will be more messy than necessary to service...

At least it wasn't just me being an idiot for not finding one!

 

[Madrab]

I'm not sure what you actually mean about servicing and what need there is for a valve in the waste pipe? Is the waste outflow immediately vertical? If so then a check valve could be used, actually I believe there is one supplied with them to avoid backflow? Either that or a tee at both ends and blanks so the vertical pine could be flushed.

When you mention servicing too, what servicing would you actually be planning? The trick with these items is to use them correctly to avoid any kind of blockage, so avoid any need to service the waste.

 

[reds42]

I'm not sure what you actually mean about servicing and what need there is for a valve in the waste pipe?

The thought is if it needs disconnecting at some point it would be nice not to deal with the contents of the verticle pipe running back down eveywhere. I believe a check valve is built into the top of the unit, but I'd quite like the ability to manualy shut the pipe off should I need to remove the unit entirely.

Even if its used properly, and nothing is put down it that shouldnt be, its no guarantee that nothing will go wrong.

 

[Madrab]

The thought is if it needs disconnecting at some point it would be nice not to deal with the contents of the verticle pipe running back down eveywhere. I believe a check valve is built into the top of the unit, but I'd quite like the ability to manualy shut the pipe off should I need to remove the unit entirely.

Even if its used properly, and nothing is put down it that shouldnt be, its no guarantee that nothing will go wrong.

Of course, and invariably things can go wrong with these. Hate them, nasty things.

Not sure if they still supply them but they used to supply a separate non return valve that connects inline into the waste run - Black rubber thing if I remember rightly.

It has an internal flap valve so stop back flow.

MacAlpine also do one, not sure if they would be completely watertight though