building codes

[davo_scuba]

greeting folks (1st time post so please be gentle)
I have a double brick/tile home highset(1980 ish) and at present i am in the process of renovating the downstairs shower/toilet and laundry into 1 bathroom, i have ripped out the walls and removed all tiles and fittings (easy part) cracked the old clay pipe waste for the shower so dug that out and replaced with a plastic 100 mm p trap coming out to a 40 mm pipe for the bath that i plan to install, concreted everything back in place. my questions are:
1. have I broken any regulations ?

2. do i have to put a floor waste in ? there was not one in from the beginning.

3. once everything is in place and i waterproof bath area and floor can i just tile floor as is, or do i need to lay mud ( can't see why as no fall )

4. if there is no fall do i need to have a rise or some sort of small step to the door of the room to contain water if there is a problem ?
I really don't want to hear that i have to install a floor waste as the concrete is like (urrr concrete and about 200mm thick) and have already taken down the walls which contained the dust.

5. when putting the new piece of pipe i brached of a ran a 50 mm pipe up and out so it will come up under the bath at the front so i can put the vanity into this is this ok to do? i also want to add the shower waste to run into and join this pipe so it does not run down the outside of the house ?

Wish i had seen this site before starting as concrete is down now.

any advice would be apreciated, i plan to do as much work a possible (money is an issue !)

[silentC]

1. Probably.

2. Technically, yes. If you were building a new house, then you would need a floor waste in all wet areas. The floor waste either has to be a dry waste (discharges to the open air) with a vermin flap, or it needs to be via an S-bend that is charged from the hand basin. However, since yours is an existing bathroom and it didn't have a waste, probably not. Since you haven't told the council about it, no-one will ever know.

3. Without a floor waste, there's no need.

4. How high would you make the step? Sooner or later the water is going to breach it. You really should put in a floor waste, but you didn't want to hear that, did you?

5. Don't see any problem with it but hard to say without seeing exactly what you've done.

I'm not a plumber (my Dad is) but have just built a house, so have been through some of this.

[bitingmidge]

Floor waste.

You can certainly do it legally without a floor waste, but all your fixtures will need built-in overflows, and prefereably you should fall the floor back to the shower. This may not be easy if it's not recessed into the floor!

As silent says, if you aren't bothered about getting an approval, providing you aren't planning to sell for a few years, who is going to know?

P

[thebuildingsurv]

Floor Wastes are not called up in my BCA, unless it forms the shower base. Is that a NSW thing. You probably should have used a plumber for the other bits, In case you did something wrong it is hard to fix in a concrete slab.

[davo_scuba]

thanks for the response
maybe should have spoken to a plumber before hand, but have had a few bad experiences with plumbers due to poor poor workmanship and not showing up.
i have bought a spa bath with a full supporting metal frame, is it still best for me to build up a layer of mud (sand and cement) under the base to stop any noise or movement.
in one or the other posts someone spoke of using insulation around the bath, i like this idea but we have a heat maintenance pump under the back piece of spa bath, if i use wall insulation around the bath cavity will the pump get to hot (fire danger) and cause a burn out or worse, there will be a removable panel at this end for access but dont want to put to many air vents due to noise coming from this area ?

[China]

Don't worry about insulation as a spa bath only holds the water for a short time unlike a full size spa pool the benifit would only be mimimal

[davo_scuba]

attached is a picture of the trap that i have put in, let me know what you think.
i will give the insulation idea a miss but will still put some in the wall for sound proofing.
thanks for your time have also posted a picture of the shower room upstairs that I completed last year

[silentC]

I can see the 40mm for the bath going in to the P trap. Then you have the 50mm coming into the branch. That all looks OK. Where is the shower and toilet?

[davo_scuba]

The shower is on the level above and at present the waste for this going along the wall and out through the brickwork, i need to move this as i will be installing a extractor with ducting so when the bath is being used as a shower we can exhaust. (that will be going into the 50mm also the downstairs vanity will go into that pipe 40 mm trap then increase the size to the 50 and join, so 2 pipes into the 50mm (they will never be used at the same time. the toilet is on a sewerage line by the wall and is not part of this system. i will take a few more pictures when some of the wall are up and pipework is in place.
cheers

[Pulse]

Davo, maybe post a few more piccies. The level invert tapers that change the size of the pipe are usually used in horizontal applications. I'm just a bit worried about the 100mm junction also, does the water flow around the acute bend? Anyway, the rules are pretty complicated so post few piccies for us all.

Cheers
Pulse

[silentC]

The level invert tapers that change the size of the pipe are usually used in horizontal applications.

The taper is just to stop shyte from building up at the base of the reducer. There shouldn't be any problem using one like that, although you'd usually use one of the flat ones (can't remember what it's called) in that situation. I'd be more worried if he used a flat one vertically.

The acute bend is his P trap under the bath. It has to contain water at all times.

[davo_scuba]

i think that i have used a flat one in the vertical on 50 mm side however the fall is both ways to the clay pipe at mimiun this is 6 deg the services that are going into this pipe both have p traps at there ends (standard sink and shower connections) before i put up any walls i will take a few more photos as all you see here is 6 inches under.

[silentC]

i think that i have used a flat one in the vertical on 50 mm side

Yes you have. I missed that. Well, to be honest I don't think it's a problem as there's no solid waste going through it, but if I think of it I'll check with my old man tonight. I've seen him bring 50mm into 100mm like that, usually a vanity or a shower or bath.