House drains should be firmly supported throughout their entire extent by rests or hangers spaced about ten feet apart and placed near the hubs and under branch fittings for rising lines. When the house drain is run close to the cellar floor, brick piers or pipe rests (Fig. 9) are generally used; when run some distance above the floor the drain may be secured to the side wall by pipe hangers (view a) or by pipe brackets (view b, Fig. 10) secured to the wall by expansion bolts; when run near the ceiling the drain should be supported by iron pipe hangers (Fig. 11) fastened to the beams overhead. Pipe hooks should not be used to support the house drain, because they are not sufficiently reliable.

Fig. 10

Fig. 11