Section 9- Special Connections and Med gas Flashcards
Waste from commercial and institutional washing machines and extractor shall not discharge into __________ unless __________.
open trench
unless it is constructed of alkaline resistant material and drained into at least a 4in trap with full size vent
Waste from semi-commercial washing machines shall discharge into ______ and waste line shall have ________ and base of the stack shall be _______ by either a _______ or _______
4in waste line for washing machines only
full size vent
washed by a washing machine or starch sink
A 4in trap on semi-commerical washing machines shall not serve more than ____ washing machinese
2
Each 4in trap on semi-commercial washing machines shall constitute ___ fixture units
4
Floor drains may be placed in the waste line if (2 conditions)
washing machines are the pump type and stand pipe for each washing machine is at least 2in above flood level rim
A semi-commercial washing machine shall not discharge into a _____
trench
The trap for auto washing machine in a new building shall be installed
12 in above the floor with a 2 in stand pipe extended at least 2in above flood level rim of washing machine
An auto washing installed in existing building shall be connected to the house sewer by a ____. It shall (3 things)
4in p-trap
be placed outside opposite side wall of the machine
have vented cover extending 3in above grade
have 4x2 tee installed on inlet of trap with 2in waste extending into building through floor to height of washing machine
No HVAC equipment shall have any drain pipe ______ but shall drain by means of _____ which shall discharge through ________ into ________ except _________ if ________.
directly connected to any DWV pipe
indirect waste
air gap or break
open floor sink, floor drain or other approved receptor
air gap required if indirect waste pipe may be under vacuum
A garage sand trap shall ….
be made of concrete with heavy cover or grate
be at least 2x4ft
be deep enough so there is at least 10in vertical distance between bottom of outlet ell and bottom of the trap
installed with 4in vent
Liquid waste from buildings using flammable oils or compounds shall discharge into a ___________ __________ it enters the sewer. The waste receiving the waste shall be ___________ and the separator shall be installed with a ________ vent.
separator
before
trapped
3in
Before entering a house drain or sewer, hot water or steam or exhaust blow offs shall discharge into _______ with ___________ and _______.
tank or basin
airtight cover
4in vent independent of any other venting system
Before enter the house sewer, all liquid waste from barns, manure pits, and stable yard drains shall _________________
discharge through a seperator
A 2in open receptacle may receive discharge from up to ____pedicure chairs. ____________ chairs shall a min of _____in open receptacle
2
3 to 6
3in
If water inlet for pedicure chair is below flood level rim or equipped with a spray hose, it will be treated as ________ and require ________ on _________.
high hazard
reduced pressure principle backflow preventer
on both hot and cold supply
