In modern stables much attention is given to the proper drainage of horse stalls. Although not of so much moment when stables are located at a distance from dwellings, or in sparsely settled districts, the horse stalls of stables that are located in sections devoted to residential or business purposes should be provided for in the same manner as any other plumbing fixture. This applies to private stables, livery stables, engine-house stables, etc.
The drainage of the horse stall is best accomplished by the use of a specially constructed cast-iron stall sink, the four sides of which pitch toward the center, from which point the waste is carried off. Below the sink a special fitting is provided which bolts to the sink and caulks into the cast-iron waste pipe. The waste and vent should be of 2-in. cast-iron pipe, cast iron withstanding the action of the acids in the waste much more effectively than wrought iron or steel.
The waste line should enter a trap located as close to the stall as convenient, and provided with two 2-in. cleanouts.
Two cleanouts may be used by taking the vent from a tee located next beyond the trap, instead of from the trap itself, as shown in Plate 10. The use of cleanouts wherever possible on work of this nature, is a necessity, as even the utmost precaution will not serve to entirely prevent the entrance of solid matter into the drain. A clean-out at the end of the horizontal cast-iron waste, as shown, will prove of much value.
A perforated cover is provided with the stall sink, its purpose being to prevent as far as possible, the escape of solid substances into the waste pipe.
The stall sink should be set well toward the rear of the stall, as shown in the plan view, in order to best serve its purpose.
The sink should be covered by a skeleton trap door, through which the liquids may find their way into the sink.
Even when provided with these drainage facilities, the horse stall soon becomes foul smelling, owing to the foul nature of the solids and liquids deposited; but if the sink is thoroughly flushed out with the hose each day, it may be kept in a comparatively clean condition.