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water hammer after new shower mixer: Just renovated and now your pipes bang every time you shut the shower? Here's…
Bathroom Rough-In for a Brighton Renovation, Case Study
Bathroom Rough-In for a Brighton Renovation, Case Study, a Prime Plumbing & Gasfitting plain-English guide to bathroom rough in brighton for Melbourne homeowners. Below we cover what works, what doesn't, and when to call a licensed plumber.
Quick answer: This bathroom rough in Brighton case study walks through the plumbing portion of a 1990s bathroom renovation. The original layout was vanity-against-one-wall, separate toilet, and a shower-over-bath. The new layout moved the vanity 2 metres to the opposite wall, shifted the toilet 600mm, and replaced the shower-over-bath with a walk-in shower with a linear drain. Plus a TMV install (required under current Victorian code). Two-day rough-in. Final fit-off after tiling.
What was changing in the bathroom rough in Brighton renovation
Original 1990s bayside Brighton bathroom layouts tend to follow a familiar pattern, utility-first, not space-optimised. Current owners typically want:
- Vanity relocated (often to the opposite wall) for better entry-from-door experience
- Walk-in shower instead of shower-over-bath
- Linear drain in the shower for modern aesthetic
- Double vanity (where space allows)
- TMV install for compliance and scald safety
This is typical of the bathroom rough in Brighton work we see, renovations every 15-25 years on the bayside housing stock.
How a bathroom rough in Brighton job actually goes
The plumbing portion happens in two visits, separated by the tiling and waterproofing phase done by the builder:
Day 1-2: Rough-in (capping, re-routing, new lines)
- Builder strip-out completed first: wall tiles, vanity, toilet, shower fittings all removed before we arrived
- Assessed existing pipework: cold supply was 1/2" copper from the 90s (serviceable), hot supply still functional from the post-1990 hot water unit
- Capped redundant supplies at the old vanity and toilet positions
- Ran new hot and cold lines to the relocated vanity (about 2 metres of new copper)
- Re-routed waste to suit the new vanity (gradient checked, minimum 1:60 for waste pipework)
- Installed new toilet branch pipe at the shifted 600mm position
- Roughed-in the walk-in shower drain (linear drain) with correct fall to the existing gully
Day 1-2: TMV installation
For a domestic bathroom in Victoria where the hot water unit operates above 50°C (almost all do), the shower outlet must be tempered to a maximum of 50°C per the Plumbing Code of Australia. We installed a thermostatic mixing valve (TMV) inline before the shower head.
This is required by code for all new bathroom installs. The TMV blends hot and cold automatically so the outlet never exceeds 50°C, scald protection for children, elderly, anyone with reduced thermal sensitivity.
Compliance and pre-tile inspection
- All pipework pressure-tested before walls were closed up
- Photographs taken of pipework runs before tile-bedding (for the builder's records and future maintenance reference)
- Certificate of Compliance issued at completion
Day 3 (post-tiling): Final fit-off
After the builder/tiler finished waterproofing and tiling:
- Vanity unit connected to new supply and waste
- Toilet connected
- Tapware fitted at the rough-ins
- Shower head and TMV connected
- Final pressure and leak test
- Certificate of Compliance covers the full plumbing scope (rough-in + fit-off)
Total plumber time: about 3 days across the full bathroom rough in Brighton renovation.
Why the TMV in a bathroom rough in Brighton install isn't optional
A lot of older Melbourne bathrooms, and many older Brighton bathrooms, don't have TMVs because they were grandfathered in under previous regulations. Modern installs require one. Two reasons it matters:
- Scald protection: children and elderly residents can be scalded by water above 50°C. The TMV prevents the shower or tap outlet from exceeding the safe limit, regardless of what the hot water unit is set to.
- Insurance and compliance: bathroom additions or refurbishments need TMV evidence for the Certificate of Compliance. Without one, the bathroom can be flagged at a future building inspection during a property sale.
Cost of a TMV at rough-in stage is modest (~$200-$400 supply + install). Retrofitting later (cutting wall tiles to install) is several times that.
Bathroom rough in Brighton, booking checklist
When you book the plumbing portion of a bathroom renovation, have these answers ready:
- Are you working with a builder, or DIY?
- What's the rough timeline (rough-in date, expected fit-off date)?
- Original bathroom era and layout?
- Any fixtures you're keeping (e.g., heritage cast iron bath)?
- Hot water unit age and capacity, does it need upgrading for the new load?
When to call a licensed plumber for a bathroom renovation
A bathroom rough in Brighton job needs a licensed plumber for:
Prime Plumbing & Gasfitting is BPC #103414 licensed and Type A Gasfitter registered. Bathroom renos are coordinated with your builder, we handle the plumbing scope, they handle tiling, waterproofing, cabinetry.
Frequently asked questions
Typically 2-3 days total spread across the renovation timeline, 2 days at rough-in stage (start of the build) and 1 day for final fit-off (after tiling). The plumber doesn't need to be on-site for the rest of the build.
Sometimes. Depends on age, material, and whether the new layout matches existing pipe positions. For 1990s Brighton bathrooms, the original 1/2" copper is usually serviceable. Pre-1980s lead or galvanised pipework needs replacement. We assess this at the quote stage.
For straight like-for-like renovations (same number of fixtures, same locations within tolerance), council permits often aren't required. Adding new fixtures (extra toilet, new bath) or moving services significantly may require notification. Your builder typically handles council liaison.
Plumbing is typically 15-25% of total bathroom renovation cost for residential Brighton work. Higher if extensive re-routing or hot water upgrade is needed. We always quote in writing before the demo starts.
Builder scope, we remove and dispose plumbing fittings (taps, shower heads, toilet) but the bath, vanity unit, shower screen, mirror, towel rails are all builder/carpenter responsibility.
Before You Book
A quick checklist to share with your plumber when you book:
- When did the issue start?
- Is it isolated to one fixture or multiple areas?
- Are there any visible leaks, smells or unusual sounds?
- Have you turned off the relevant isolation valve?
- Bathroom renovations: full bathroom service page
- Thermostatic mixing valve installation: TMV service page
- Brighton plumber services: Brighton suburb landing
- Leaking tap repairs: for fit-off issues
For a bathroom rough in Brighton plumbing quote, phone Prime Plumbing & Gasfitting on 0475 407 670 or send an enquiry. BPC #103414. Fixed-price quotes before demolition starts.
