Plumbers & electricians in Croydon

The town centre is towers and tram lines, but almost none of Croydon’s housing looks like that. A few streets out you are into Victorian and Edwardian ground: bay fronted terraces and villas around the older centre and through Addiscombe, plenty of them split into flats long ago. Broad Green sits north west, with converted houses and purpose built flats along London Road.

South west, Waddon runs down toward the Purley Way, the bypass opened in the mid nineteen twenties, and mixes older terraces with the interwar semis that filled in around the new road. East, Shirley was farms and hamlets until the nineteen thirties, when the open land was built over almost in one go with suburban semis, on ground that rises toward the wooded heights beyond.

So a plumber in Croydon works across several sets of assumptions inside a couple of miles. A boiler repair in Croydon might be a combi in a converted flat or a system boiler feeding a cylinder in a Shirley semi. A blocked drain in Croydon might be shared Victorian clayware or one clean run behind an interwar house.

Why a shower pump transforms one Croydon house and ruins the next

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A gravity system, still the arrangement in plenty of the interwar semis around Shirley and Waddon, puts a cold tank in the loft and a cylinder in the airing cupboard and runs on the height between them. Upstairs there is barely any left, so the shower dribbles. A pump is the honest answer, but there are two kinds. A positive head pump sits below the tank and needs water already arriving under its own weight before it starts. A negative head pump senses a much smaller change and starts when the outlet is level with the tank or only just below. Fit a positive head pump where the head is negative and it will not start, or it will cut in and out as you move the tap. That is not a faulty pump. It is the wrong pump.

The other half of the trouble is air, and it comes from how the pump was connected rather than from the pump itself. The hot side must not be teed into the top of the cylinder beside the open vent, because a pump pulling hard there draws air down the vent and into itself. The cold side wants its own tapping in the tank. What you hear is a pump that hunts and surges, hammers in the cupboard, keeps running after the shower is off, or delivers hot water in pulses. That reads like a dying pump. Usually it is drinking air, and air ruins a pump given long enough.

What resolves it is the connection, not a bigger pump: a flanged take off drawing hot water from below the vent, or a dedicated side tapping, and an independent cold connection in the tank with a decent drop into it. The pump wants a level base, flexible tails and a permanent supply from a fused spur. One case rules all of this out. With a combi, or an unvented cylinder fed off the main, there is nothing stored to pump. Pumping the incoming main is restricted under the water regulations, and it cannot invent flow that was never there. A weak mains fed shower is a flow rate or a restriction, and a pump is an expensive way to find that out.