| 摘要 |
<p>The sanitary fitting includes a device which has a backflow preventer (12) fitted in the water outlet (1) so that water flows when valve is open. It is set to an opening pressure which is less than the maximum permissible internal pressure of the low-pressure hot-water-preparing unit. The backflow preventer is in a holding device (6) which allows it sufficient movement to leave a ventilation path at negative pressure in the outlet.</p> |
