Drain cleanouts provide access to the sewer for cleaning without disassembling appliances like toilets or pipes.
Sewers in modern plastic materials, properly designed and installed, should require minimal or no maintenance.
- cleanouts are required at base of stacks and at each horizontal change of 45o or more
- if more than 1 change in direction in a run of a pipe, only 1 cleanout every 40 ft (12 m) is required
- cleanouts should be installed every 75 - 100 ft (25 - 30 m)
Cleanouts size and clearance distance in front of the cleanout can be taken from the table below:
|Pipe Size |
|1 /1/2||1 1/2||12|
|2 1/2||2 1/2||12|
|4 or larger||3 1/2||18|
- 1 inch = 25.4 mm
Sizes and dimensions of pipes and tubes, and their fittings - inside and outside diameter, weight and more.
DFU are used to calculate the drainage flow from fixtures and the required capacities of sewer service systems.
Dimensions of Poly(Vinyl Chloride) (PVC) Sewer Pipes with belled end.
Dimensions of cast iron soil pipes.
Drain pipes and vent stack sizing.
Support of Drain Waste and Vent - DWV - pipes.
Vents in draining systems protects traps against pressure differences that could cause them to siphon or blow out .
Drainage Fixture Units (DFU) connected to building drains and sewers.
Recommended drain trap sizes for different types of fixtures
Minimum pitch of horizontal drainage pipes.
Capacities of horizontal storm drain piping systems.
Calculate expected volume flow load in sanitary drainage systems.
Maximum Drainage Fixture Unit - DFU - loads in sanitary piping systems.
Septic systems handles waste from drain systems.
Carrying capacities of sewer and wastewater pipes - gpm and liter per second.
In sewage piping and pumping systems the fluid flow rate must be kept within certain limits to avoid operating problems.