Which Hose Goes on a Bidet Seat?
In Short
A flexible pressure hose from the T-piece at the angle valve to the seat. Pick the length by the route the hose has to take – with a little slack, no tension, and no kink. One piece of the right length beats two joined together.
What We've Been Sold as Normal
That a hose is a hose and the hardware store will have something. But a connection that sits under mains pressure all the time isn't a garden hose – and the joints are the only places a bidet seat can leak at all.
The Honest Explanation
The parts. Right now, the hose to the tank is attached to the angle valve. A T-piece goes in between: one outlet continues to the tank, the other runs through its own hose to the seat.
The thread. Angle valves in Germany mostly have a 3/8-inch connection. Matching T-pieces and hoses usually come with bidet seats. If you buy extra parts, compare the thread first – one more adapter is one more seal.
The length. Measure the route, not the straight line: from the angle valve along the wall to the connection on the seat, usually at the back on one side. Add some slack so you can move the seat a little for cleaning. Our seats come with 100, 200, or 300 centimeters of hose, at the same price.
When it needs to be longer. If the angle valve is on the opposite side of the toilet from the seat's connection, with a concealed tank whose valve sits behind the cover, or if the hose needs to run around a pedestal.
How it should lie. No tension, no sharp kink, not squeezed between the ceramic and the wall. A kinked hose throttles the water; a taut one strains the joints.
What You Often Hear – and What's True
“Too long doesn't matter, as long as it isn't too short.”
Almost. A very long hose has to be laid neatly so it doesn't kink or get in the way.
“Two short hoses with a connector will do.”
It works, but it adds another spot that can leak.
“A garden hose is the same thing.”
No. Indoors you want connection hoses made for constant mains pressure.
“The T-piece weakens the tank.”
Not noticeably. The flush and the seat run one after the other.
Putting It in Context
The hose is the least noticeable part of a bidet seat and the only one where length really matters. Measure the route once, add a bit of slack, lay it without a kink – and it'll never be an issue again.
