| Before buying a spray bidet you should check on the | | | | waste which enables the waste plug to be raised and |
| regulations of your local Water Authority to make | | | | the bidet emptied by pressing a control knob which is |
| sure that the plumbing system of your home | | | | part of the mixer and diversion valve mechanism. |
| complies with these regulations, or can be made to | | | | This kind of bidet is normally sold with mixer, spray |
| do so. In all probability you'll need to run a separate | | | | and pop-up waste already fitted. |
| cold water supply pipe from the cold water storage | | | | Dealing with the waste water |
| cistern to the bidet. | | | | The waste water from a bidet must run through a |
| You're not allowed to run this branch from another | | | | trap. If your house has a single stack drainage |
| cold water distribution pipe, or to make a direct | | | | system this should have a deep seal of 75mm (3m). |
| connection from the main. Similarly the hot water | | | | With the older two- pipe drainage system a shallow |
| supply to the bidet must be taken by a separate | | | | seal of 50mm (2in) is permissible. |
| distribution pipe from just above the hot water | | | | If you've got a single stack system you'll have to run |
| storage cylinder and not as a branch from the | | | | the branch waste from the bidet and connect it into |
| existing bathroom hot water supply pipe. | | | | the main stack. And you'll have to follow the district |
| A further requirement is likely to be that the base of | | | | or borough council's requirements regarding the |
| the cold water storage cistern must be at least | | | | gradient of the branch waste pipe and how the |
| 2.75mm (9ft) above the level of the bidet inlet - a | | | | possibility of it being fouled by the discharges from |
| rule that could involve you in raising the position of | | | | the WC can be averted. |
| your cistern. | | | | If your house has a two-pipe drainage, system, then |
| While ordinary basin taps can be used for over-rim | | | | it's important to remember that a bidet is a waste |
| bidets, a special mixer with a diversion valve and a | | | | and not a soil appliance, so the waste water can be |
| supply pipe to the spray must be fitted into a spray | | | | run into an open gully. |
| bidet. These mixers often incorporate a pop-up | | | | |