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A technical advice requested,

(56849)
   Owais
Monday, February 22, 2010 06:37 AM 
Reply: >
Dear expert brothers,

I need an advice as one of my newly built bathrooms on 1st floor gives a bad smell. Some times, the smell disappears on its own and the plumbers are unable to help me out.

Regards
ZB replied on Monday, February 22, 2010 07:35 AM 

owais,

Provide a FLOOR TRAP to soppy water drainage pipe at ground floor level before it get joined to main sewage line.
M.Yousaf replied on Monday, February 22, 2010 07:37 AM 

Dear Friend,

See if water “SEAL” is present in your WC, sometimes water could be seen but then smell gets a chance to escape from the water. You can verify by adding some water “SLOWLY” and topping up the seal, if by doing this smell goes out then you need to change the seat!

Install a vent, all the way to the roof, just at the “ELBOW” of the drain line, just coming out from the bathroom.

If nothing works, then change the drain lines from smaller size to bigger, all the way to the “MAIN HOLE” at the ground level.

I had the same problem and only I know how much I struggled to solve the problem!
Owais replied on Monday, February 22, 2010 10:33 AM 

Many thanks to ZB and M.Yousaf.

Wish you all the very best.
Owais replied on Monday, February 22, 2010 11:42 AM 

Dear M Yousaf,

Can you please mail me cell contact of your plumber as I live in DHAI phase 2.

Regards
CMY replied on Monday, February 22, 2010 11:47 AM 

Owais if it is a newly built bath I assume plumber did put a P Trap on drain line for toilet. I suspect either there is no P trap on one of floor drains OR its cracked or getting dry due to water eveporation and generation smell from that drain line AFTER water gets evaporated with time. Smell disapear f some one run some water on floor drains during normal cleaning.Make sure you run some water on all floor drain every week. If you don't run water on all floor drains make sure you run water first in all drain and than put some cooking oil in drain at last. Cooing oil on top of standing water will not let standing water to evaporate too early.
Owais replied on Monday, February 22, 2010 01:32 PM 

Thanks CMY Sahib.I will check on my next visit to Pakistan.

Kind Regards
Amjad replied on Monday, February 22, 2010 04:02 PM 

The same problem was also with my bath room, i think p trap is not connected properly with lime and because of leakage you are getting smell.
ZB replied on Tuesday, February 23, 2010 03:17 AM 

infect the traps are meant to stop all bad smells in sewage line. but this is generally observed that on 1st floor it is difficult to accommodate trap and pipes unless you cast the bathroom slab little lower then general floor level, some time the trap is not placed leveled and water seal stays incomplete and all bad smell bounce back through this trap.

99.99% plumbers and owners understand the value of a trap for WC but takes easy the lines of wash & basin and shower.

While there should be no worry of a trap for a European WC as it has the built-in and a 3rd grade plumber do not miss this in an Asian WC too.

The problem is generally in wash & Basin and shower waste line where plumber and owner think it is not smelly issue but due to the uneven level of trap, water seal does get completed and all the bad smell gets in there fore it is suggested to have a good quality and level floor trap on the end of drop pipe on soppy water before this join to man hole or main sewage line.
CMY replied on Tuesday, February 23, 2010 04:29 AM 

Every place where you are going to connect drain to sewage line must have a P trap in place to keep smell in main holes. Even if it is ground floor drain in open area you MUST install P trap there.
limo replied on Tuesday, February 23, 2010 08:10 AM 

Owais, the main source of such a smell is Floor Drain usually.CMY is right that they often get dried off and water seal is no more there thus allowing the bad smell.However putting oil in the trap is a real tip but let me say that violation of plumbing codes too.Also make sure that your floor drains are not floor gulleys, ie no other drains are connected to your floor drain.Secondly make sure all of your plumbing fixtures do have P-traps and most importantly vents.Let me also give you a tip of the day.Put a Backwater valve on the main sewage line that connects with the manhole.Its mother of all solutions believe me.Have a good day.
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