If your drains fall is shallow, the trap door may not open causing a back-up and blocking the drain. If this happens just remove the trap door, it will not protect against flooding anymore, but you can still use it as a rodding point.

Valvula perfecta y de buen material. Envío rápido.

Prodotto ottimo, pagato 3 volte meno rispetto ai negozi nel mio paese.

Super Ware.

Bon matériel