Shower trap - sewer smells

[Barnjet]

Hi Guys,
Some advice please on sewer smells coming from the shower trap. I suspect the water level in the trap is not high enough to prevent smelly air coming back. See photos. From the waste pipe arrangement, I don’t see how you can create a water seal when the top of the waste pipe is above the water level?

Any advice much appreciated

 

[ShaunCorbs]

Where’s your dip tube will look like a tube around 4” long

eg

https://mcalpineplumbing.com/sites/default/files/uploads/drawings/STW9-RC.pdf

 

[Barnjet]

Thanks for the diagram. No tube fitted 😳 and that no doubt is the cause of the problem, as I can see the tube creates a type of “u-bend”. Next questiion is, where can I source a replacement tube? The trap is about 25 years old.
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I think this is the part avavailble from Plumbers Mate

McAlpine 80mm Seal Trap Long Shower Insert Tube STW80 - 38005013

McAlpine 80mm Seal Trap Long Shower Insert Tube A long replacement insert tube which forms the trap that will fit the deep 80mm water seal McAlpine

www.plumbers-mate-sales.co.uk

thanks Shaun for your help

 

[townfanjon]

^^^ as above , you have a bit missing

 

[ShaunCorbs]

Thanks for the diagram. No tube fitted 😳 and that no doubt is the cause of the problem, as I can see the tube creates a type of “u-bend”. Next questiion is, where can I source a replacement tube? The trap is about 25 years old.
[automerge]1606046666[/automerge]
I think this is the part avavailble from Plumbers Mate

McAlpine 80mm Seal Trap Long Shower Insert Tube STW80 - 38005013

McAlpine 80mm Seal Trap Long Shower Insert Tube A long replacement insert tube which forms the trap that will fit the deep 80mm water seal McAlpine

www.plumbers-mate-sales.co.uk

thanks Shaun for your help

stick a tape measure or ruler in until it touches the bottom of the trap is it around 160mm-165mm from the bottom to the top of the tray ?

 

[Barnjet]

No, it is 125-130mm. A shorter dip tube required?

 

[ShaunCorbs]

No, it is 125-130mm. A shorter dip tube required?

50mm seal trap then so STW50-TUBE required
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Eg McAlpine Shower Insert Tube for 50mm Seal Traps - 38005012 - https://www.plumbers-mate-sales.co.uk/mcalpine-shower-insert-tube-for-50mm-seal-traps---38005012-5352-p.asp

 

[Barnjet]

Thanks Shaun, very helpful. 👍👍

 

[Ben-gee]

As long as the diameter is correct you can cut a dip tube down to length.