Plumbing #2 - #3 (Wastewater Systems, Winterizing and De-winterizing,Holding tank monitoring systems) Flashcards
What does CSA Z240 code book say needs to always be behind water when it is flowing?
Air
What is stop drilling?
Stop drilling relieves the pressure on cracks to prevent them from spreading
What is the minimum height you need to extend the vent pipe above the roof line?
2”
How does the sewer hose connect to the termination valve?
With a bayonet connection
What does the CSA Z240 require anytime the sewer hose is not connected?
That a sewer cap must be in place
Where are the holding tanks usually mounted?
They are usually mounted under the floor and drain through termination valves
CSA Z240 code says the termination valve must be where on the RV?
It must be on the left side within 22.5 ft (6.9 m) of the rear of the RV, left of center.
If underneath the RV, what must not be more than 18” (450 mm) from the side wall?
The termination valve
Can termination valves be activated from inside the RV?
No
What is the minimum size hole for grey water discharge?
1-1/2”
What is a grey water tank for?
For holding liquid waste
What are grey tanks typically made from?
Polyethylene or ABS plastic
What is a black water tank?
Body waste holding tank
What tank should you always dump first?
Black water tank
How full should the black water tank be before draining?
At least 75% full
Always make sure that termination valves are what when dumping?
Opened fully
What does the CSA Z240 code state for the minimum size for the black tank drain?
A minimum of 3”
What should you always install with a holding tank sprayer?
A vacuum breaker
How can polyethylene tanks be repaired?
They can be plastic welded or repaired using spin fittings
How can you repair ABS tanks?
They can be repaired using ABS solvent cement or by making a paste by mixing ABS pellets and acetone
You should always do what before performing a repair on a cracked tank?
Always stop drill first
DWV =
Drain, Waste & Vent
What are 2 types of vents?
• Wet vent
• Dry vent
Every water system must have what?
A waste water drainage system consisting of the drain waste and vent (DWV) systems.
What do drainage systems ensure?
That waste water can be safely conveyed to the holdings tanks. And to the tank drain connection.
What are drainage systems composed of?
• Piping
• Fixtures
• Traps
• Fixture baskets and tail pieces
• Valves
• Vents
• Piping systems
• Termination systems
Typically, RVs only have one drain outlet. However, under what clause can the vehicle have separate drain outlets for each tank?
Under clause 7.6. Installation of waste-holding tanks
7.6.1 ( Liquid wasteholdingtank ) - 7.6.2 ( Body waste holding tank)
What does ABS stand for?
Acrylonitrile Butadiene Styrene
What color is ABS piping?
Usually black but can also be white
What location will the type and size of the material be printed on?
Along the pipe.
Where do ABS fittings have the information embossed on?
The plastic
How are ABS piping and connections fitted together?
They are solvent welded together.
What are the 6 steps to making ABS pipe joints?
1) Cut the pipe to the desired length
2) Remove burs and foreign material.
3) Dry fit and mark reference lines
4) Apply cement to both pipe and fitting
5) Assemble while still wet and rotate slightly to align reference marks.
6) Wipe excess cement from the pipe joint.
What does the repair procedure for ABS tanks depend on?
The type of damage
• small fissures
• cracks
• bursts
What does the CSA Z240 code book refer to with code 4.5.4?
Cracks, holes, or other imperfections in materials shall not be concealed by welding or soldering or by paint, wax, tar, or other leak sealing or repairing agents.
What is the minimum vent size for a wastewater system?
The minimum vent size is 1-1/4”
What is the minimum trap size
for a wastewater system?
The minimum trap size is 1-1/4”
What is the maximum slope allowed for a drain pipe inside an RV?
1 in 50 Toward the fixture tee or wet vent.