Bathroom smelly from waste

[jackg]

Small bathroom: Shower, bath, loo and basin.

Klargester some 30 yards away.
Sometimes **** gets stuck in the nearest inspection chamber at the rear of the house and smell arises.
The smell goes when I wash the **** away from the chamber.

Guessing the traps don't work properly?

Bath trap is a U bend due to a space restrictions, the floor prevents a bottle.
The other traps are bottles.

Bath is used once in three months, other three are used daily.

Is a trap at fault?

Is there a test to carry out to determine the source of the smell?

 

[dilalio]

Bath is used once in three months,

Maybe the bath trap is drying out!?
But the inspection chamber should not keep blocking! I would consider if the falls to the septic tank are sufficient and/or what "sharp edges" may be catching sanitary products at the inspection chamber and/or what you are putting down the drains!

 

[jackg]

Thanks.
Had a closer look in the inspection chamber and poked around with a screwdriver. I could see what I thought was dried loo roll on the bed of the pipes and chamber, closer inspection and prodding indicated it was a hard abrasive material which could be chipped away, about 1/8" thick at the thickest.
This is a hard limestone area so could be scale build up. I installed a water softener about 6 months ago although the drains are ten years old.
I turned the kitchen sink tap on to see what kind of flow occurred, the water backed up into the unused ports of the inspection chamber and it cleared too slowly to be ok.
The pipe route is an L, 10 metres then a small inspection chamber then another 10 metres.
I checked the next inspection chamber, which was similar, but not as bad.

Maybe I need a drain inspector?

 

[dilalio]

Would that be Inspector Loosoe?
Descale drains and see if that gives you improved performance, then if it does just pop annual descaling maintenance onto your calendar!

"Annual" not "anal"

 

[lostinthelight]

I would not mind betting that the hard stuff is soap and fat deposits , it could almost be mistaken for concrete its so hard.
I have lived at properties with septic tanks for nearly 70 years and seen seen some serious lumps of the stuff.
litl
edit
just found a pic of what I found in a pipe:

 

[jackg]

Thanks for your comments.
I am not sure what to use to try to remove the stuff. Chemical or mechanical?
I applied some bicarb to the piece pictured and the bicarb has not dissolved it.
Could get some dilute hydrochloric acid or caustic soda but the seals would not appreciate either.
Mechanical means are rods with a circular bung which may scratch the inside of the pipe, the scratches may then act as attractants for any more residue?

 

[jackg]

Other side of the material.

 

[lostinthelight]

Have you rodded the drain to make sure its clear apart from the deposit?
litl

 

[jackg]

Only with a length of old black water pipe, so not properly

 

[lostinthelight]

Only with a length of old black water pipe, so not properly

Only with a length of old black water pipe, so not properly

Then in my opinion you need to rod it properly otherwise you don't know how much of the hard stuff you are dealing with .
litl

 

[dilalio]

Your falls from highest to lowest and/or flush volumes are not sufficient to dispel waste efficiently to your septic tank. Without major upheaval and expense, My opinion is that you will have to regulate what you put down the drains (toilet paper type, shampoos, oils, cleaners, etc) and add drain cleaning to your annual/biannual house maintenance schedule!