Stopcocks And Isolators
Valves left half closed, or seized partly shut, which restrict the whole house or a single branch.
Home/Water Pressure Repairs
Water pressure repairs in Bellville start with a gauge rather than a guess. The same weak shower can be a half-closed stopcock, a failed valve, a blocked strainer or a supply problem the City has to fix. Measuring at the meter tells you which before you pay for anything.
Tell us whether the whole house is weak or only some taps, and whether it is worse at certain times of day.
Low pressure is a symptom. These are the faults behind it, and the invoice line for each is a part, not the symptom.
Valves left half closed, or seized partly shut, which restrict the whole house or a single branch.
A pressure control valve on the geyser line that has failed low, which gives weak hot water with strong cold.
Grit caught in tap aerators, shower heads and valve strainers, often after the supply has been off and back on.
Undersized or internally restricted supply pipes, found by comparing pressure at the meter with pressure at the tap.
A leak on the supply line steals flow before it reaches the taps. The meter shows it within minutes.
Banging pipes when a tap or appliance valve closes, cured with pipe clips, arrestors or a slower-closing valve.
Cold water reaches your taps at whatever pressure the City's network delivers to your street. The City has said it maintains a minimum of 2.4 bar at the critical point of each zone, and most properties sit above that. Hot water is different. Before it enters the geyser it passes through a pressure control valve that holds it at a fixed, lower pressure to protect the cylinder.
So a typical house runs two pressures at once: mains pressure on the cold side and a reduced pressure on the hot side. At a plain tap nobody notices. At a mixer shower the two meet in one valve, the stronger cold side pushes back against the weaker hot side, and the result is the familiar complaint: the shower will not run properly hot, or it swings in temperature whenever somebody opens a tap elsewhere.
The fix is not a bigger geyser or a pump. It is balancing the two sides, so the cold supply to the mixers is reduced to match the hot. That is usually done with a combination valve on the geyser that includes a balanced cold take-off, or a separate reducing valve on the cold line that feeds the showers.
The same imbalance explains why pressure problems are often misread. A weak hot shower with strong cold taps points to the geyser's valve or the balance between the sides, not to the City. A house where both hot and cold are weak points somewhere else entirely, and the two need different repairs.
If the shower runs cool or swings in temperature while the cold taps are strong, ask for the hot and cold sides to be balanced before anyone sells you a pump.
A pressure problem has a single cause far more often than several. Finding it is the whole job.
Static and flowing pressure are measured in front of you, at the meter and at the problem tap.
The reading narrows it to one fault before any part is changed.
The repair is quoted as a fixed price once the fault is found, not charged by the hour while searching.
If the supply itself is low, you are told so plainly and not sold work that cannot help.
The diagnosis is quick, and the repair is priced as a fixed job once the cause is known: a valve, a strainer, a section of pipe. See the plumber prices page for how call-outs and labour are charged.
The geyser's pressure control valve deliberately feeds the cylinder at a lower pressure than the mains. If that valve fails low, or its strainer blocks, the hot side drops further still.
Ask your neighbours and check whether the City has announced work in your area. If their pressure is low too, it is almost certainly the supply. A gauge reading at your meter confirms it.
When a supply is restored, air and loose sediment move through the pipes and can lodge in aerators, shower heads and valve strainers. Cleaning them usually restores the flow.
Only if the supply is genuinely low and the house plumbing is sound. A pump fitted to a house with a half-closed valve or a leak adds cost without fixing the cause, which is why the pressure is measured first.
Water hammer, which happens when flow stops suddenly at a quick-closing valve such as a washing machine or a lever tap. Loose pipes make it louder. Securing the pipes and fitting an arrestor usually cures it.
Yes. Excess pressure strains flexible hoses, valves and geyser fittings and makes taps drip. It is measured on the same visit, and the right valve is fitted if it is too high.
A single weak outlet points to something local: a blocked shower head, a faulty mixer cartridge or a restriction in that branch. The rest of the house is working, so the supply is not the problem.
Get In Touch
Weak showers, surging taps or pipes that bang? Send the details and we will come back with a time to measure it.