Size is a claim about your pressure, not about luxury
A fixed head is judged on how evenly it covers you, and coverage is a flow-per-area question rather than a size question. Double the diameter and you quadruple the area the same litres have to fill; that is why a 30 cm head on a 1.5 bar supply feels like standing in drizzle while a 20 cm head on the same supply feels like a shower. Read the stated flow rate together with the pressure it was measured at — a figure without its bar value tells you nothing — and read the maker's stated minimum. Two mechanical details separate the durable from the disposable: the thread, which is G1/2 on essentially everything and therefore not a constraint, and whether the nozzles are rubber cones you can rub clean. In hard water that second detail decides whether the head still works in three years. We compare face size and shape, thread size, stated flow rate with its test pressure, spray pattern, and whether the nozzles are cleanable.
Rain head · 30 × 20 cm rectangular · 304 stainless and ABS · G1/2 · 360° ball joint · silicone nozzles
The widest face in this hub for the lowest price — and a listing that calls a 30 × 20 cm rectangle square, which is worth noticing before you order.
Best for: A large enclosure on strong mains pressure, where face area is the point and the exact shape needs checking first.
≈ 17 €
Rain head · 20 cm round (8 in) · stainless, electroplated · G1/2 · 360° ball joint · TPE nozzles
A 20 cm round stainless head with an air-injected pattern and TPE nozzles, at the price of a takeaway — and without a single flow figure.
Best for: A straight replacement for a tired head on an existing arm, where 20 cm round is the shape wanted.
≈ £26 / 20 €
Rain head · 20 × 20 cm square (8 in) · stainless · G1/2 female · 360° rotation and 15° tilt · 100 silicone nozzles
A 20 cm square stainless head that publishes its nozzle count and its tilt angle — two small facts nobody else on this page bothers to give.
Best for: A modern square-fitting bathroom in a hard-water area, where the nozzles need to be wiped rather than soaked.
≈ £27 / 20 €
Rain head · 28 cm round (11 in) · self-cleaning rod mechanism · brass nut and brass ball joint · G1/2
The only head in this catalogue with a moving self-cleaning mechanism: a rod that rises with the water and pushes deposits out when you turn it off.
Best for: A hard-water household tired of wiping nozzles, on a supply strong enough to fill 28 cm.
≈ £29 / 29 €
Rain head · Ø 22.5 cm round · ABS with brass ball joint · under 8 l/min at 3 bar stated · ½ in universal · ceiling mountable
The only rain head in this hub that publishes its flow WITH the pressure — under 8 litres a minute at 3 bar — and the only one whose saving can therefore be checked.
Best for: A household that wants a measurable reduction in hot water rather than a claim about one.
≈ £32 / 31 €
