First fix pipework
Supply and waste run in the open wall and floor, set out to the finished tile depth rather than the bare substrate.
Home / Bathroom & Kitchen
Bathroom renovation plumbing in Durban is judged on a stage nobody photographs: the pipework in the open wall, pressure tested and signed off before the tiler arrives. Everything after that is finishing.
Tell us whether the layout is staying or moving. Keeping outlets where they are and relocating a toilet or shower are different jobs, because waste needs fall and supply does not.
Two stages, weeks apart, and the first one is where the risk lives.
Supply and waste run in the open wall and floor, set out to the finished tile depth rather than the bare substrate.
Held above working pressure and watched before anything is closed up. The highest value hour in the whole job.
Baths, basins, toilets and shower trays set, sealed and connected, level and to the fall the waste actually needs.
Bodies set at the right depth for the finished surface, which is decided at first fix and cannot be adjusted later.
Sinks, dishwashers and plumbed fridges, with isolators fitted so a future appliance swap is not a plumbing call.
Tied to work you can see and test, rather than a deposit up front against a promise.
Every renovation has a moment where it becomes irreversible, and in a bathroom it is not the day the tiling goes up. It is the hour before, when the pipework in the open wall is either tested or it is not. That hour decides whether the next five years are uneventful or expensive, and it is the one stage nobody takes a photograph of.
A pressure test is simple. The new pipework is capped, filled, and held at a pressure comfortably above what it will see in normal use, then left and watched. A joint that is going to fail will fail under that test, in an open wall, where correcting it is a matter of cutting out a fitting and remaking it. The whole exercise takes a fraction of a day and it is the cheapest insurance available on the entire project.
Skip it and the same joint still fails, just later and somewhere much worse. A fitting weeping behind finished tiling does not announce itself. It soaks the substrate, works through the waterproofing, and shows up months afterwards as a stain on the far side of the wall or a section of tiles sounding hollow. At that point the cost is not the joint. It is the tiling, the waterproofing, the wall behind it, and whatever was stored against it in the meantime.
Durban adds its own reason to insist on this. On a network that empties and refills daily, concealed pipework does not lead a quiet life: it takes a pressure cycle every time supply returns, along with the air and scoured grit that come with it. Joints in this city are asked to do more work than joints in a place with steady supply, and a marginal one that would have survived elsewhere will find itself tested repeatedly here.
So make the test a condition rather than a hope, and make a payment depend on it. Ask, before anything starts, for the first fix to be pressure tested and for you to see it holding before the walls close. Structure the payments so one of them lands at that point. Any competent plumber expects to be asked, and the ones who object have told you something useful for free.
All five are cheap now and impossible later.
Staged, tested and paid for in that order.
Fixture positions and finished surface depths agreed on the wall first, because a chased pipe cannot be moved.
You are shown the test holding before anything closes up, rather than told afterwards that it was done.
Tied to completed and visible work, not taken up front against an intention.
If the geyser or its safety arrangement is touched, the certificate is issued then, not chased during a sale.
Cost first, then the stage that decides whether the rest of it lasts.
Set against tiling, sanitaryware and labour, the water side is rarely the big number on a bathroom quote. It is simply the number that costs the most to have got wrong. There are two stages to it. First fix puts pipe into open walls and floors while everything is still reachable. Second fix, usually weeks later, hangs the sanitaryware and connects it up. Labour follows the trade's published guidance of R450 to R850 an hour excluding VAT. Ask for first fix and second fix as separate figures, because they happen weeks apart and are easy to conflate when comparing quotes.
You need the plumbing done by somebody qualified to do it, and on many renovations that is arranged through the builder rather than separately. What matters is that you know who is responsible for the water side and that the first fix gets pressure tested before it is covered. The arrangement that causes trouble is where the plumbing is treated as incidental to the building work, because then nobody owns the test and the first person to discover a fault is whoever lives there afterwards.
The new pipework is capped, filled and held at pressure well above working pressure, and then watched for a period to see whether it holds. If a joint is going to weep, it weeps under test, in an open wall, when fixing it costs an hour. The alternative is that it weeps three months later behind finished tiling, and then the cost is not the joint, it is the tiling, the waterproofing, the wall on the other side and everything stored against it. It is the highest value hour in the entire renovation.
Moving an outlet is the expensive decision in any bathroom and it is worth understanding why before committing. Supply pipes can be routed almost anywhere. Waste needs continuous fall to work, so moving a toilet or a shower means re-establishing that fall across a new route, which can mean building up floor levels or cutting into structure. The question to ask is not whether it can be moved but what the fall requires, and that should be answered before the layout is finalised rather than after.
Be careful, and tie payments to stages you can see. Deposits taken with nothing delivered afterwards are a real and recurring problem in this market. Structure it so money follows completed and visible work: a modest amount to secure materials, a payment on completed and tested first fix, and the balance on completion. Nobody reasonable objects to that structure, and it protects both sides. Get the stages in writing before anything starts, not verbally at the door on day one.
A Certificate of Compliance is required where a geyser is installed or altered, and on property transfer. A bathroom renovation frequently touches the geyser arrangement even when that was not the intention, because pipework is rerouted or valves are changed. If the geyser or its safety arrangement is affected in any way, you want the certificate issued at the time rather than discovering during a sale that work was done and never certified.
It affects the testing and the commissioning more than the installation. A pressure test needs a reliable supply to fill and pressurise the system, so work gets planned around the published outage windows rather than against them. It is also the moment to consider whether the renovation should include storage, since the pipework is already open and adding a tank feed later means opening things up a second time. A renovation is the cheap moment for that decision.
Concealed joints that were never tested, by a distance. After that: waste runs laid with insufficient fall, so a shower drains slowly from the day it is finished and nothing can be done without lifting the floor. Then mixer bodies set at the wrong depth for the finished tile thickness, which is discovered at second fix when the trim will not sit flush. All three are decided during first fix, which is why the unglamorous stage is the one worth supervising.
Get In Touch
Renovating in Durban? Tell us whether fixtures are staying put or moving, and you get first fix and second fix as separate figures.