indoor fire hydrant We make different styles of indoor hydrant, landing hydrant, underground hydrant,etc.1. Item: SNSS 652. Type:SN50,SN653. Doubl-valve and double-outlet type: SNSS65, DN654. Strength test pressure:2.4mpa5. The indoor fire hydrant is a fixed indoor fire-fighting equipment in factories, public buildings, warehouse,etc. The Indoor Fire Hydrant