drain cleaning chemicals

[REDSAW]

got a job next week,

there is a 8 meter straight run under flooring through kitchen and bedroom of 40mm proberbly pushfit.
it is a straight run to the upstand to the sink trap and it is running slow, the run of only appears to be 8'' over all as its within the joists. i may be able to rod gently most of it and use chemical cleaner. the waste serves the kitchen sink and w/m.
any thought of which chemical preferance or methods?..
apparently it has been done a couple of times before with simular problems so a re-accuring one.
thoughts welcome.

 

[HoodedClaw]

I'd be tempted to use a snake on it.. unless thats what you mean by gently rodding it?

 

[justlead1]

Hi Caustic soda is useful for this sort of problem. But it can be dangerous when using as the rapid action when in contact with water can burn your skin / eyes. Good Luck

 

[adam121]

defo would use a decent drain snake. I unblock drains and sinks everyday and im very anti chemical, never use them as they will wreck the waste pipe system! Snake it from the kitchen sink.

 

[REDSAW]

defo would use a decent drain snake. I unblock drains and sinks everyday and im very anti chemical, never use them as they will wreck the waste pipe system! Snake it from the kitchen sink.

a bit difficult that as the pipe is in the corner wall of the cabinets, disapearing down through the floor then into a 90 bend running 8m to outside?.

 

[justlead1]

Hi. With a wash machine attached to the waste, they usually keep clean. However with such a long run the chances are if poorly fixed and acts like a giant trap holding water when nothing is using it.

 

[adam121]

You can access the kitchen sink trap? if you want to spend the money on a good drain snake then it would travel around all the elbows etc work its way down the pipe.If the pipe runs into a gulley outside, you could try snaking it upstream from there. Ive got a ridgid hand spinner drain snake k-25, never let me down and it has 7 or 8m of cable i think.Just depends on if you would want to spend £100 rather than the crappy £20 drain snakes they sell in b&q.

 

[REDSAW]

well thats it really, i dont normally do this work often perhaps once a month including blocked loo's. usually i just replace new pipe work or plunge.
sods law i gave a price for the hour plus new externalls to drain for £60 and she took it. so £100 on gear wont pay for itself in my case. i recon there is a sag in the run and its collecting fats.
my initial thought was bung some chemicals in then shove a line from down stream to drag the scum out?.

 

[tamz]

Some one shot or spirits of salts (hydrochloric acid) will disolve most things and not harm the plastic. Wear gloves and don't breathe the fumes.

 

[quality]

I recently tried a chemical called Knockout on my own kitchen sink drain and worked a treat.

ps. be careful though if you use it cause pretty potent stuff