Drainage design
Your floor plans, the fixtures on them, and the sanitary plumbing and drains they need: sized, vented and drawn to G13/AS1 and G13/AS2.
- G13/AS1Second Edition Amendment 102 Nov 2023
- Building Regulations 1992
- AS/NZS 3500.2:2025
Plans
Designed to
The PDF stays in this browser: nothing is uploaded.
Choose the PDF of this floor's plan.
The site
Bedding, G13/AS2 Figure 7
Print at actual size, not fit to page.
Rooms
Which fixtures are in which room. G13/AS1 Table 2 counts a bathroom's WC, basin and bath or shower together as 6 discharge units, and a laundry's tubs and washing machine as 5: less than they come to one by one, so the pipes that carry a whole room can be smaller.
Place the fixtures on the plans; then sort them into rooms here.
Report
Every fixture, pipe and stack with its size and the paragraph it comes from, and what the rules found in the design.
The report comes once the plans have fixtures and a connection to the sewer.