Question about Hydrants??
My Department just recently color coded our fire hydrants to NFPA standards,
Red top = less than 500 gpm
Orange top = 501-1000 gpm
Green top = 1001-1500
Blue top = 1501 on up
My questions is how do I figure out a rough guestimate of how many gallons per minute are actually flowing into the truck from the supply line?
My department uses a forward lay using one 2.5 inch supply line. Yes.....we still use 2.5 inch supply line......right now we are having a argument because some of our older fireman believe that it doesn't do any good to hook more than one 2.5 inch supply line from the same hydrant to the same truck.....but thats another story......
If you lay 200 foot of 2.5 inch supply line from a hydrant to the truck on a red hydrant (max 500 gpm), how may gallons per minute are actually reaching the truck?
Same question for a Orange top hydrant?
Same questions for a Green top Hydrant?
Same question for a Blue top Hydrant?
Is there a easy formula you can do in your head? I'm just looking for a quick estimate???
One of the things we did find doing this is that the majority of Hydrants in town were red tops with a great number of them only flowing about 150gpm.....thats a huge problem that the City staff had been hiding from us over the years.......
Thanks in Advacne for your help......