Building traps

[jar546]

Left side is the line to the grease separator, right side is the house dwv which comes to a building trap.

The sewer authority has no written requirement for a whole building/house trap but the inspector in this town always makes them install one.

How would you handle this situation?

 

[steveray]

Isn't it supposed to be vented after the trap?...Never seen a whole house trap....doesn't that double trap all of the fixtures?

 

[pyrguy]

Yes it does. However some areas require it. See THIS (Click) for georgia's amendment to the plumbing code requiring whole house trap. It's a diagram on page 18 of 20.

 

[georgia plans exam]

Note that Section 912.4.2 of the amendment indicates that a safe waste system MAY be used as an alternative to other waste systems required by code yet, Section 912.4.3 states that it SHALL be used.

Confusing eh?

GPE

 

[RJJ]

I use to require standard running traps, but with low flow toilets they have become a problem. We have since not required them. All fixtures have traps and floor drains are primed. The excess gas will vent to the roof. To many clogs with the old traps.

 

[pyrguy]

Yes it's confusing but "the most restrictive shall be used" was my fall-back position when I was in Georgia.

 

[TimNY]

Generally whole-house traps are prohibited on buildings connected to the public sewer so that the sewer can vent. We don't allow them when connected to the sewer. On a septic system we do not require them but will approve them if installed.