Class A Customs only installs the following fittings into our Fresh / Gray tanks at this time
1.5" NPT Female - fitting is closed
.5" NPT Female - fitting is open
1.25" Outer Diameter x 2" Long Smooth Pipe / Boss Fitting - Spout
For information on custom fittings or placements please use the
Water Tank Build Form, please note this option is only available when order 50+ of a tank on single order.
1.5" NPT Female - fitting is closed
use a razor knife to cut membrane out, easiest when cut in halves
Fittings and Hoses We Offer That Fit 1.5" NPT Tank Fitting
Can be used with 1.5" Fitting on tank to connect to 1.375" Hose
Can be used with 1.5" Fitting on tank to connect 1.5" PVC Pipe for draining fresh or gray water tank
1.375" (1-3/8") Food Grade Water Hose1.375" hose can be used with the fill dishes and the Loose Fitting / Fixture - 1.5" Thread x 1.25" Hose Barb Fitting - Gray
1.375" hose can not be used with spouts on tanks.
.5" NPT Female - fitting is open
Fittings and Hoses We Offer That Fit .5" Tank Fitting
Can be used with .5" Fitting on tank with .5" Hose for Fill Dish Vents and Water Pumps
.5" Hose can be used with the fill dishes vents and the water pumps we sell.
1.25" Outer Diameter x 2" Long Smooth Pipe / Boss Fitting - Spout glues does not stick to pipe, it can not be sealed or capped
you will need to use the
1.25" Hose with Clamp
Hose We Offer That Fit 1.25" Tank Fitting
1.25" (1-1/4") Food Grade Water Hose1.25 hose hose can be used with the gravity dishes and spouts/boss fittings on tanks.
1.25 hose does not fit the Loose Fitting / Fixture - 1.5" Thread x 1.25" Hose Barb Fitting - Gray
Pipe Tape / Pipe Dope
It
is recommended to use plastic NPT male fittings with plastic female NPT
fittings to avoid damaging the threads, metal thread fittings can crush
the plastic threads.
Very little, if any, pipe thread tape is needed
using too much pipe tape will damage the threads. We do not recommend
pipe dope as you can not remove the fitting later, if used be sure to
use a food safe brand.
What fittings will I need for my plumbing?
This will depend on how you are setting-up your tank and will vary by application, we are not aware of what items you will be needing, please view the Plumbing Examples
All water tanks Class A Customs carries must be gravity fed and vented, they are not pressurized tanks.Have a certified technician install all parts to prevent product damage and personal injury.
A garden hose (a connection from your faucet indoors, etc. anything that pushes the water) is a pressurized water line,
do not
make a secured connection to the water tank with a pressurized line.
Tanks need to be gravity feed, this allows for air to escape while the
water is going into the tank. You ca use a Gravity Fill Dish located on
the outside of your vehicle to fill the tank, please view the Basic
Plumbing Diagram below.
"Venting" the tank lets air move in and
out of the tank when in use. Tank must have a large enough opening for
air to freely move in and out of tank, if tank is not properly vented
tank will explode when filled or implode when emptied. Trying to use a
pressurized line "half-way" to prevent damage to the tank will does not
work because you can control the amount of water flowing but not the
pressure in the line, leaving the tank to fill risks exploding the tank
or damaging fittings.
Sanitize each tank prior to use to remove any debris from the manufacturing process. Tanks are made in a warehouse, wipe with a damp cloth to remove surface dust or scuffs
I am going to use a sealed pressurized line to the tank.
This will void any warranty on the tank. We
can easily tell when a tank has exploded due to incorrect usage, you
will split the tank or force the fittings out of the tank, again this is
not covered under any warranty.
Fill Dish Information
The
fill dish is located on the outside of your unit so that you can easily
add water to your tank without the need of opening a compartment or
climbing under your unit. You can find the fill dishes in the
Plumbing Category.
For adding water to the Water Tank you need a Gravity Fill Dish,
the hose rests in the port it does not screw onto the port this allows
you to place a garden hose into the Gravity Fill Dish port without
making a sealed connection so the supply is not pressurized.
For using Water Directly from a garden hose you need a City Fill Dish,
the hose makes a sealed connection and the water supply is pressurized,
you can not hook this to your water tank and you do not need to go
through your water pump.
We carry Gravity Fill Dishes, City
Fill Dishes and Combo Fill Dishes that have both gravity and city, the
benefit of having both is you can have a water tank of fresh water but
if you go to a location that supplies pressurized water (campground -
fair - etc.) you do not need to use your water tank supply of water you
can simply use the water provided. Be sure to look at the provided
example plumbing diagram for more reference.
For my application I am not using a fill dish.
You
can place a larger fitting such as a PVC elbow into the per-installed
tank fitting and just rest the garden hose / pressurized line in this
fitting, Do not make a
secured/sealed connection as this would then be pressurized and would
damage the tank. This would then be a gravity fed fill, you can make the
same type of fitting set-up for your vent.
- Be sure to
have an additional fitting open at the top of the tank to let air in/out
when using the tank, this would be your vent.
- You can cap the fitting (a) and vent (b) when transporting to prevent water from spilling.
- Be sure to uncap the vent when removing or adding water to the tank.
- It is best to have a screen over the vent fitting to prevent anything from entering the tank.
BASIC PLUMBING KIT IS FOR USE WITH FRESH TANKS ONLY
NOT FOR USE WITH GRAY OR WASTE TANKS
Gray Water Tanks are used to hold used water from handwashing sinks, dish sinks, and showers.
Black Water Tanks are used to hold Human Waste and/or used water from handwashing sinks, dish sinks, and showers.
Class A Customs Tanks that are white in color can be used for either Fresh or Gray Water use.
Class
A Customs Tanks that are black in color can only be used for Waste or
Gray Water use, do not use a black tank for fresh or drinking water.
If
you want to place your tank directly under your sink or shower you can
use a Uniseal Fitting to install a fitting directly where needed to
allow the pipe to go into the tank.
UNISEAL FITTINGS INFORMATION
Uniseal Fittings
are food safe and can be used for Fresh, Gray, or Waste Water use, they
are available in size .5" to 3", no adhesives are needed for use
Uniseal® Pipe-to-Tank Seals
Uniseal®
is the world's best seal, and installing it is a simple process. After
cutting a hole in the wall of a tank or other surfaces, the seal is
inserted. Then the pipe is coated with a slippery detergent and pushed
into the seal. The Du Pont Alcryn® is the key to the liquid-tight seal. When the pipe is pushed through the rubber-like Uniseal® from the outside, the inside Alcryn®
wall becomes thin enough to allow the pipe to squeeze through and then
forms a liquid-tight seal. The coefficient of friction with the plastic
pipe is roughly three times higher than any other material, which allows
it to create a better seal than with any other material.
- Alcryn® melt-processable rubber
- Long-lasting
- Resistant to acids, oils, greases, gasoline & sewage
- Withstands pressure & suction
- Withstands heat & cold
- Easy installation
- Reduced labor & material costs
- In static conditions, the seal is good up to 65 psi
Installation Instructions and Video at Bottom
1. Be sure to have recommended hole saw for selected fitting, check chart before cutting.
2.
Using hole saw cut hole in wall, ensure that the hole is cut clean.
Irregular holes could cause poor seating and possible leaks. File or
sand the edges so there are no rough or sharp edges be sure to remove
any remaining debris.
3. Insert the Uniseal with the wide surface facing out.
4.
Make certain the pipe to be inserted is cut clean and square, file or
sand the edges so there are no rough or sharp edges to cut the Uniseal
surface.
5. Use liquid soap or Teflon lube on the pipe to be
inserted. Insert the pipe into the Uniseal as far as needed to clear the
inside of the seal by about 2".
6. Be sure to clean tank thoroughly prior to using removing any debris and lubricant residue.
Search Uniseal in top search bar or look in Plumbing Category.Uniseal® Part No | Uniseal® Size Sch 40 Pipe I.D. |
| Pipe O.D. Size *2 |
| Holesaw Size Required |
|
| Imperial | Metric |
| Imperial | Metric |
| Imperial | Metric |
|
U018 | 3/16" | 4.75mm |
| 0.250" | 6mm |
| 0.315" | 8mm |
|
U025 | 1/4" | 6.5mm |
| 0.375" | 9.5mm |
| 0.5" | 12.7mm | *1 |
U0312 | 5/16" | 8mm |
| 0.40" | 10.5mm |
| 0.5" | 12.7mm | *1 |
U038 | 3/8" | 9.6mm |
| 0.675" | 17mm |
| 1.0" | 25.4mm |
|
U050 | 1/2" | 12.7mm |
| 0.84" | 21mm |
| 1.25" | 31.7mm | *1 |
U075 | 3/4" | 19.2mm |
| 1.050" | 27mm |
| 1.25" | 31.7mm | *1 |
U100 | 1" | 25.4mm |
| 1.315" | 33mm |
| 1.75" | 44.4mm |
|
U125 | 1 1/4" | 32mm |
| 1.66" | 42mm |
| 2" | 50.8mm |
|
U150 | 1 1/2" | 38mm |
| 1.9" | 48mm |
| 2.5" | 63.5mm |
|
U200 | 2" | 51mm |
| 2.375" | 60mm |
| 3" | 76.2mm |
|
U275 | 2 3/4" | 70mm |
| 2.913" | 74mm |
| 4" | 101.6mm | *1 |
U300 | 3" | 76.2mm |
| 3.5" | 89mm |
| 4" | 101.6mm | *1 |
U400 | 4" | 102mm |
| 4.5" | 114mm |
| 5" | 127mm | *1 |
U400-SDR35 | 4" | 102mm |
| 4.33" | 110mm |
| 5" | 127mm | *1 |
*1 -
Uniseals U025 and U0312, Uniseals U050 and U075, Uniseals U275 and
U300, Uniseals U400 and U400-SDR35 require the same sizes of holes.
The difference is made up in the thickness of the Sarlink 4165 rubber.
*2 -
Always measure the Outside Diameter (O.D.) of your pipe. This is the
most important size to match into the Pipe O.D. hole size of the Uniseal
to create your seal.
