Show WATER TROUGH IS AUTOMATIC R receptacle ele eitai le fall a itself ts elf a atten ja a s emptied ati ed but never overflows valve does docs work A watering trough which will hll fill as often as emptied but will not overflow Is shown in tho the illustration the rough hangs from a spring arm which a mounted on the water pipe when he trough becomes nearly filled with L automatic watering trough water the weight forces the valve stem iown down and shuts oft the supply before the water in the trough is completely exhausted tho the spring arm no longer held down by the weight lifts suf to raise the valve and start ho he flow |