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--- electric_shower_or_mixer_shower:choosing_based_on_water_pressure [2026/10/07 01:33] – created linette20m
+++ electric_shower_or_mixer_shower:choosing_based_on_water_pressure [2026/10/07 03:36] (current) – created brodiekeck
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 Choosing between an electric shower and a mixer shower is not really a matter of preference; it comes down to what the property's existing hot water system can actually deliver, and the two options make very different demands on it.
-The heating element is the part doing the actual work, raising the temperature of the water as it passes through the unit, and it is also the part most exposed to hard water. In areas with harder mains supply, elements pick up scale over time in exactly the way any heating element does, which reduces efficiency and eventually causes failure, showing up as a shower that runs cold, runs lukewarm, or trips out shortly after being switched on.
 Neither option is a universal upgrade over the other; each solves a different starting condition, and the right call is decided by the pipework already in the property, not by brand preference.
-Plumb2U carries the parts and spares for both instantaneous and storage electric water heaters, from elements and thermostats to the fittings that connect them into a system, at trade prices with next-day despatch across the UK. For merchants and installers working from a [[https://gus-info.ru/away?url=http://www.hyanglin.org/home/board_nQZz30/272755|plumbers merchants]] account rather than a shop counter, that means the right spare is one order away, not a special one.
+The kilowatt rating printed on an electric shower's box is the single number most buyers look at first, and it is also the most misunderstood. A higher kW rating does not mean a more powerful shower in every sense; it means the unit can heat a given flow of water through a larger temperature rise. Those two things, flow rate and temperature rise, are locked together by the electrical supply available, and pushing one up necessarily limits the other.
+Explore this further at [[https://www.yazzle.ru/go/aHR0cHM6Ly93aWtpLndvcmxkb2Znb3RoaWMuZGUvZG9rdS5waHA/aWQ9eW91X2Nhbl9maW5kX291dF9tb3JlX3ZpYQ|trade plumbing supplies]].
-For a trade buyer, the practical upshot is that unvented spares are not interchangeable with vented ones. A pressure relief valve rated for an unvented system is a specific, tested part, not a generic valve that happens to fit the thread. The same goes for the expansion vessel, sized to the cylinder's stored volume, and the tundish and discharge pipework that safety fittings rely on to work as intended. Buying the wrong-rated part to save time on a job is a false economy at best.
+Cost is the other real variable. Braided hoses cost more than rubber equivalents, and for buyers working through volume on multiple jobs, that difference adds up over a year of trade supplies. The right call is matching hose type to the duty and visibility of the specific connection, rather than defaulting to one type across every job regardless of application.
-Neither option is universally better. A trade buyer fitting out a small annexe with one shower and one basin is usually better served by instantaneous. A buyer working on a house with a family's worth of daily hot water demand is usually better served by a cylinder sized correctly for the job. Getting the sizing wrong in either direction shows up fast, as lukewarm water, long waits, or an immersion element working harder than it should.
+A braided hose is built around an inner core, usually rubber or PTFE, with an outer layer of woven stainless steel strands wrapped tightly around it. That braid does not stop the core from ageing, but it does two useful things: it takes on most of the mechanical load and abrasion resistance, protecting the inner core from damage, and it gives a visible early-warning sign if something is wrong, since a failing braided hose often bulges or shows a strand starting to fray before it lets go completely. Rubber hoses tend to fail with far less warning.