Why is the base of some US fire hydrants (traditional) at surface or pavement level, while others are several feet above ground?

By traditional, I mean what would be commonly seen in residential or downtown commercial districts and on oil or chemical production facilities. For example, what a member of any US jury would understand a fire hydrant to look like without being instructed

2

Answers


  1. 0 Votes

    “Member of US jury”, eh? You weren’t thinking of supeonaing me if I answer?

    Happily I’m not an expert in this, although I was curious enough to look around a little. I found a lovely site with a multipage article called Designing Water & Hydrant Systems. I’ve cited Part 4, which I believe answers your question at the very bottom. It has pictures of two hydrants: The “famous” wet-barrel hydrant, with smooth sides, and the “famous” dry-barrel hydrant, which has a very visible bolted connection just above ground. (See the second citation for a cross-section diagram. Neat.)

    The dry-barrel is better suited to regions where hard freezing ground is not an issue, and the reason seems to be — at least in part — that the inside valve that opens to the water’s source pipe can be placed underground.

Please signup or login to answer this question.

Sorry,At this time user registration is disabled. We will open registration soon!