Considering new soil connection

[mac42]

I want to build an outside toilet, and it seems I have two choices about how to route the waste.

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The rectangle is an old IC that looks like this:

View media item 101339
The circle is a new IC that I put in about 5 years ago, approx 4m downstream. Connection at either point will give me an OK drop.

I'm not really sure whether I should dig a longer (deeper) trench to the plastic IC which I know has an available connection, or put in a new IC further upstream to keep the new run shorter.

I'm not really bothered about the cost of a new IC or how much labour involved, just want the least risky/most reliable solution.

Note this is a public sewer, serving next door, and yes I'm aware of the BC requirements surrounding any mods.

Thanks for any advice!

 

[Ian H]

It would be easier to connect into the newer IC assuming it's a plastic on with a couple of capped inlets.

The 45degrees bend won't be an issue.

 

[Hugh Jaleak]

Pity those capped off laterals in the brick chamber are on the wrong side, might have been able to reopen those and save some digging. +1 for Ian's advice, miles easier tapping into an existing plastic chamber than trying to graft another chamber into a live run.

 

[noseall]

Why cant the route to the placcy chamber be a straight line?