Presentation is loading. Please wait.

Presentation is loading. Please wait.

PLUMBING Presentation on Trap Loss. Trap Loss At the end of this session you should be able to : Explain what is meant by trap seal loss.

Similar presentations


Presentation on theme: "PLUMBING Presentation on Trap Loss. Trap Loss At the end of this session you should be able to : Explain what is meant by trap seal loss."— Presentation transcript:

1 PLUMBING Presentation on Trap Loss

2 Trap Loss At the end of this session you should be able to : Explain what is meant by trap seal loss

3 Why does Trap seal loss occur ? Trap seal loss occurs when the seal of the trap is lost as a result of poor practice and by not following the regulations with regard to sanitation pipework installation. Trap Loss

4 There are three main causes of loss of trap seal: Self siphonage Induced siphonage Compression Each one of these is the result of poor installation work Trap Loss

5 Caused by appliances connecting into a common waste discharge pipe. This arrangement is not acceptable on primary ventilated stack. Induced Siphonage

6 Most common in washbasins and steep sided appliances. Ensuring the waste pipe is at the correct length and fall would avoid this problem Self Siphonage

7 Usually caused by discharging W.C. higher than the lowest waste connection. Use large radius bend at base of stack (min 200mm) Min 450mm between invert of the drain and lowest branch waste pipe. Compression

8 Anti siphon trap Trap Loss prevention

9 Observe these maximum pipe lengths and you shouldn’t have a problem. Loss of the trap seal can also pose a health hazard. Maximum pipe runs AppliancesDia (mm) Min.trap seal depth (mm) Max. length of pipe (m) Pipe Gradient inDeg ° Max Bends No. Max drop (H) m Washbasin or bidet 32mm 75mm1.7m2.200 Washbasin or bidet 40mm75mm3.0m1.8 to Bath or shower 40mm50mmNo limit1.8 to 9.0No limit1.5 Bowl urinal 40mm50mm3.0m1.8 to 1.9No limit1.5 Trough urinal 50mm75mm3.0m1.8 to 1.9No limit1.5 Kitchen sink 40mm75mmNo limit1.8 to 1.9No limit1.5 Dishwater or washing machine 40mm75mm3.0m1.8 to 1.4No limit1.5 W.C.110mm50mmNo limit1.8 minNo limit1.5

10 We discussed what the causes of trap loss are. Looked at each of the causes of trap loss. How to rectify the problem of trap loss. Session Summary


Download ppt "PLUMBING Presentation on Trap Loss. Trap Loss At the end of this session you should be able to : Explain what is meant by trap seal loss."

Similar presentations


Ads by Google