Water Supply and Distribution Flashcards
Chapter 6 (17 cards)
Minimum size of water service?
3/4”
How far should building sewer be separated from water service with undisturbed earth?
5 feet
The required separation distance shall not apply where a water service pipe crosses a sewer pipe, provided the water service is ___________(1) to a point not less than ___________(2) feet horizontally from the sewer pipe centerline on both sides of such crossing.
(1) Sleeved
(2) 5 feet
The required separation distance shall not apply where the bottom of the water service pipe, located within 5 feet of the sewer, is not less than __________ inches above the highest point of the top of the building sewer.
12 inches
Water-hammer arrestors are required on plastic piping.
True or False
False
What is the maximum allowable lead content for all fittings, valves and pipe in water supply system?
8%
Pipe, pipe fittings, joints, valves, faucets and fixture fittings utilized to supply water for __________(1) or ___________(2) purposes shall comply with NSF 372 and shall have a weighted average lead content of ______(3) percent or less.
(1) Drinking
(2) Cooking
(3) 0.25%
Water service pipe shall conform to NSF ______.
61
Water service pipe or tubing, installed underground and outside of the structure, shall have a working pressure rating of not less than _____(1) psi at _____(2) degrees F.
(1) 160 psi
(2) 73.4 degrees F
What is the pressure rating of hot water distribution piping?
100 psi at 180 degrees F
What is the pressure rating of cold water distribution piping?
160 psi at 73.4 degrees F
“Lead free” shall mean a chemical composition equal to or less than ______ percent lead.
0.2 %
Flux for soldering must conform to ASTM ________.
B813
A full open valve shall be located either outside the building within _____(1) feet of the foundation wall in a readily accessible valve box, in the crawl space within _______(2) feet of the crawl space access door or within the building in a location where it may be accessed without the use of a ladder or a tool for each individual tenant space occupancy or address.
(1) 5 feet
(2) 3 feet
Maximum intervals for identification markings on water distribution pipes?
25 feet
The developed length of hot or tempered water piping, from the source of hot water to the fixtures that require hot or tempered water, shall not exceed _______ feet.
50 feet
How many water service pipes shall a hospital have?
Two
