I need more drop on this soil pipe...

That will still require the bodged-up external pipework to be altered, which means changes to that ?grey water pipe that crosses it

You could ban wet-wipes and 'luxury' padded loo roll though. Stick to plain-old standard loo paper.

The lateral to vertical connector is a 92.5 degree angle, when measured from below (87.5 degrees above). As long as the lateral connection in inserted straight then the fall should be correct. That's how I always interpreted it, though many modern houses have the lateral connection hidden between ceiling and upstairs floor and break this rule if the loo is too far from the stack.

Bronco? or San Izal?

The stuff that had 'Now wash your hands' printed on it !

No amount of messing about with the external pipe work will help with blockages in the pan. Bucket of water has yet to fail me and saves having to deal with a dirty plunger... If it's only the son's motions that are causing a problem perhaps he needs more roughage in his diet.

Excessive use of loo roll and a small exit could be problematical. A word in his shell like to suggest he tries to cutdown on loo paper and/or ensure that the loo has cleared after he flushes. ie no appreciable water rise in the pan just before the flow stops.

Could also cheap design ignoring the almost certainly well known range of dimensions and shape that make for a good loo. Like where it's comfortable sit and the alignment that creates of bum to pan. And there are cultural variations, is it the Germans who have a shelf for the poo to land on so it can be inspected for worms? You're supposed to put paper on the shelf before you poo...

my father-in-law had stuff with HM Stationery Office printed on it. He was a civil servant, it was probably borrowed from the office

Do you know that it didn't?

One thing to do, is compare your recollection of "how well" the toilet used to flush years ago (just flushing water, look at swirl pattern and velocity), versus today. If the bowl drains slightly slower than it used to, with nothing but water present, you have to figure out why.

Sometimes the cause is the cross-section of the area that drains the bowl is reduced by buildup. Buildup which is difficult to see directly from above. The buildup closes off the flow enough, that it magnifies the ability of bog roll to clog things.

Normally, if you take a soil pipe apart (depends on what the pipe is made of), the inside can be relatively clean in terms of built up materials. As long as there's a good flow there, when it flushes, the pipe can be clean. But if there is crystalline buildup, it won't likely be in the pipe, but closer to the bowl. And that makes inspection difficult, may require either an inspection mirror or a waterproof webcam kind of tool.

You might be dismayed, if you went to the trouble to change the rise over run, and the damn thing flushed no different than before.

Paul

one in a hundred minimum. one in sixty probably optimal over 7 feet that's only an inch drop

The answer is to have a bigger amount of flush.

A greater drop beyond the U bend wont fix that.

I hate to say it, but if its a hard water area, you may have massive scaling in the U bend.

I spent a merry week after I moved house once with brick acid, chisel and every proprietary descaler I could find, and eventually removed about a 2 inch layer of s*it encrusted scale round the U bend.

These days I fill the bog up with a descaler overnight once every month or two

In fact its well worth using a shitload of brick acid every so often to shift scale followed by caustic soda or hot bleach to shift any fat bergs..

If you tip acid down the loo,does it fizz? If so tip more and more until it doesn't...

tell him to wash his arse first before wiping it.

Of course it won't, what am I thinking? What a waste of a thread :)

It's a new pan, think it would have to be a *very* hard water area to get enough scale/urea buildup to significantly affect the flush in less than a year.

Of course with the standards of plumbing work show recently plumber could well have installed new pan onto partially blocked by scale old pipe without removing scale first...

But a simple 'long drop' would work! Probably not acceptable though...

We only took the building on a few years ago and there was no WC installed. The underground plumbing in the yard is only around 5 years old.

The reason I feel like there needs to be more drop is that the flush is quite slow to drain when it is just water. But as has been pointed out that would make no difference to a blockage at the U bend.

Perhaps there's an impediment elsewhere in the pipework or the loo is just poorly designed.

I need to inspect more of the pipe internals. Joy.

Is that the glossy stuff they had in school?

I am repeating something I said a while back.

I was once asked, if I got s*it on my arm, would I be happy with just using paper to remove it? My answer, no. Therefore, one piece to remove most, then a warm wet rag to clean up. Wash it and hang.

And for those that think s*it is poison, wrong. It may well be a toxin if eaten but what isn't when in certain amounts.

Ray.

I'd not depend on people using bog roll economically, just be thankful we are not all using torn up newspaper any more!

I obviously cannot see your picture, so I'll not give any advice, but wherever there is fairly narrow piping at a shallow angle and maybe with sharp bends it almost always bungs up at some point! Brian