Waste for 100 flats?

[macka09]

Hi guys. I’m on a job at the moment where the building has 100 flats over 4 floors. The problem is there’s no mechanical supervisor on site or any drawing in regards to the waste pipe work. One of the issues seems to be, there’s only 5 vents going out to atmosphere. today we’ve been told to run a float in the ceiling void on the top floor to pick up 5 flats on the top floor as well as it serving the 15 flats below. This doesn’t seem right at all. Are there any regs that prevent this or is there any guidance that should be followed? Any advice would be great. I reckon they’re are going to Durgo most of it.

 

[ShaunCorbs]

Just done my water regs course and it noted that plastic pipe can deform if tested at too high of pressure. 1.5 times max operating pressure is the norm for hard pipe, plastic pipe should be tested at 1.1 times design pressure.

Was reading what hep want they want a test pressure of 18 bar

if any of our slimline fittings are included with the system, then an 18 bar test for minimum of 45 minutes should be carried out.(the old grey ones)

 

[MOSSEP]

Some conflicting information there then, 18bar sounds pretty excessive though doesn’t it. Just looked up the JG speed fit test method and it states 2bar for 10 mins and 1then bar for 10 mins, maybe it’s this short time period that prevents damage?

 

[ShaunCorbs]

It’s weird would stick to 1.5x myself saw on jg website there fittings and pipe are tested to 44 bar (under lab conditions) so can’t be too bad for them