Drain and p trap?

[CrawfW]

Hi,

How many drain pipes can connect through a single p trap?

I was planning on a single drain pipe carrying the waste from three toilets and two showers, passing through a p trap before the inspection chamber. The trap suddenly looks pretty small, and likely to get blocked by toilet paper.....

Thanks!

 

[Hugh Jaleak]

From 3 toilets? Toilets need to be directly connected to the drain via 110mm/4" pipework.... Where does this trap feature?

 

[Madrab]

If You're talking about a 110mm underground lowback P trap? That's really for use with gullies and exposed drains where they are connected to an underground drain further down creating a water seal to avoid drain smells, wouldn't be used in an vented soil stack that toilets would normally be connected to.