Connection to Sewer Mains

Question for a plumber in Sydney please.
Background
We live in one of three 1870's terraces.
When the sewer was connected the sewer line was shared.
Each side terrace sewer lines feed into the centre terrace's line, (in our case one from the bathroom, one from the kitchen and one from the laundry) and then into the water board's main sewer line that runs through the back gardens of the terraces.
Seeing as I am landscaping the backyard, I thought I might 'future proof'.

I DONT want to connect to the waterboard's main sewer line at the moment, however thought I might put in the riser.
The board's mains is 2mtr's down, I am moving soil around at the moment, I _so_ dont want to have to dig that far down more than once!
I have the diagram that shows where the 'cap' is on their main in our property.

Question
Will the waterboard allow the riser to be cut in, even though we wont be connecting for a few years?
I know the waterboard does the actual join to the main, but do they put in the riser or is that a plumber's responsibility/job?

The "riser" as you call it sounds like the connection point, and usually the water authority have to connect it and it costs money.

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Originally Posted by bricks

The "riser" as you call it sounds like the connection point, and usually the water authority have to connect it and it costs money.

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Yup, I know the waterboard does the actual connection to the mains but does a plumber supply the riser from the main 2mtrs down to surface level or do the waterboard?

As for money, to reroute all our plumbing, plus put an overflow below our lowest point, the cheapest quote was $6000.00 hence I am not doing it now (beats my other neighbours price, for theirs, $15000.00).

As I'm in S.A. I'm not sure of the exact process for you.
In some areas the water authority want you to dig the hole to their size specs and then they connect, the riser is an inspection point and is most commonly refered to as the government I.P. When the water authority connect the sewer to mains they would (as a matter of course) install their inspection point to ground level, this is so that they may access it for future inspection and cleaning.

If you know how deep your connection point needs to be ( confidently) , then they should be able to leave your connection at a reasonable level ;ie 1500mm down or something like that. this will save you/ your plumber digging up a two meter connection for a 1200 deep drain pipe.

You do not connect onto the inspection riser by the way that is for inspection only. If your onsite at the time, and have the appropriate fittings you might be able for the right price ( 24 cold cans normally does it) get them to install a bend and a second riser for your plumber to connect onto when you need to. Normally this second riser or even a connection at grade is done by your plumber.

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I know the waterboard does the actual join to the main, but do they put in the riser or is that a plumber's responsibility/job?

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Actually, the waterboard don't do it.
It's the job of a "minor works contractor"(plumber with an extra qualification) to cut the junction in. They can also do the riser while they are at it. Or your plumber can do the riser.

It will have to be inspected before backfilling.
It is acceptable to do just this part for now.

If the junction is already there just get a plumber to do a riser and get inspected. This will be a much cheaper option.

You could do a boundary trap (if required(sounds like paddington so yes)) while you've got a big hole dug. You may even need a reflux valve if it is a surcharge area.

The Board or their contractors will cut the junction in only, or they may run a 'sideline' into the property leaving a 'lamphole' cover in your yard. It is then the property owners responsibility to get a plumber to connect on to the wing of the junction or the sideline riser and have it inspected before backfilling. They wont just cut a junction in and leave it there, they'll want to see it connected. And yes it does cost.