Available in the Plumbing Category
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
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.
Instructions
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".
We do not offer clean-out ports at this time but there are many options online that allow you to install the needed clean-out port.
Dometic Universal Holding Tank Clean-out Kit
Class A Customs does NOT sell this item. You will need to verify if items will fit your application, such as being food safe, we are not aware of this.
Hypro 6" Flat Surface Mounting Male-Threaded Tank Lid & Ring Assm.
Class A Customs does NOT sell this item. You will need to verify if items will fit your application, such as being food safe, we are not aware of this.
8 inch Boat Hatch Cover Deck Plate Hatch,White 8 inch Non Slip Inspection Hatch w/Detachable Cover
Class A Customs does NOT sell this item. You will need to verify if items will fit your application, such as being food safe, we are not aware of this.
Blank Tanks mean no fittings are installed in tank. You will need to verify the lead time on Blank Tanks as we spin the fittings into our tanks as soon as they are made.
If we are currently making a tank we can get you a Blank Tank very quickly, shipping the next business day, however, if we are not currently making a tank it can take up-to several weeks to get a tank.
You can call or use the contact us form to ask about lead times on the Blank Tank you are needing.
When ordering a Blank Tank place the tank(s) you are needing in your cart and at check-out in Customer Comments specify what tanks are to be Blank:
EXAMPLE:
Part # is a BLANK TANK
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
use a razor knife to cut membrane out, easiest when cut in halves
1.375" 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.
glues does not stick to pipe, it can not be sealed or capped
you will need to use the 1.25" Hose with Clamp
1.25 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
Are there fittings on both ends of the tanks?
Please look at the photos of each tank as fitting placement can vary by tank, typically fittings are all located on one end of the tank.
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.
1.375" hose can notbe used with spouts on tanks
For adding water to the Fresh / Gray Water Tank you need a Gravity Fill Dish
the food safe garden hose rests in the fill port on the fill dish - it does not screw onto the port
this is a non-pressurized fill
For using water directly from a food safe garden hose you need a City Fill Dish
The plumbing will bypass your water tank and hook directly to your water heater and faucets.
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.
Gizmo Vent Cap VC-M-1.5 - Male Thread - 1.5"
Class A Customs does NOT sell this item. You will need to verify if items will fit your application, such as being food safe, we are not aware of this.
Class A Customs does NOT sell this item. You will need to verify if items will fit your application, such as being food safe, we are not aware of this.
Using a water pump with the tank pressurizes the water line after the water pump, it does not pressurize the water tank.
Again be sure to have a top fitting on the tank open to let air in when removing water from tank.
Food/Drug Grade Pipe Sealant Pipe Sealant with PTFE EXAMPLE ONLY - We do not sell this item
I bought a fitting from my local hardware store and it won't fit.
Be sure you are using NPT fittings and getting the correct sizes. Finding the Correct Pipe Thread SizeTubing, Hose & Fittings
3/8" Hose Barb x 1/2" MNPT Nylon Male Adapter
1/2" MNPT Nylon Plug with Square Head
Only use this with tanks that will overflow outside of your unit, you do not want to overflow inside of unit.
Black Waste Tanks - 3” ABS Female Pipe - outlet can not be moved -
Gray Waste Tanks - 1.5" ABS Female Pipe - outlet can not be moved - smaller outlet this tank is for dirty water from shower, handwashing, dish-washing
Grommet (not food safe - waste tank use only) or Uniseal (food safe - fresh/gray/waste use) will secure inlet/vent pipe with no adhesives needed.
Examples of Items to Vent Tanks - Class A Customs does NOT sell this item. You will need to verify if items will fit your application, such as being food safe, we are not aware of this.
Sanitize each tank prior to use to remove any debris from the manufacturing process. When tanks are manufactured they do not have the holes for the fittings so holes are drilled and fittings installed, the tanks will have shavings from drilling the holes. We do not flush the tanks due to wanting tanks to be completely new and unused.
** DO NOT USE FRESH SCENT OR ANY SCENT ENHANCED BLEACH **
Never mix bleach with ammonia or other cleaners.
Open windows and doors to get fresh air when you use bleach.
With tank empty, pour chlorine solution into tank. Use one gallon of solution for each 15 gallons of tank capacity.
2. Complete filling of tank with fresh water.
3. Allow to stand for three (3) hours
4. Drain and flush with potable fresh water.
Any residual chlorine odor will dissipate naturally.
If you don’t have safe bottled water, water treatment tablets can be used to disinfect water. These tablets are popular among campers and hikers, as well as in other countries. They are available in different sizes and made to treat specific amounts of water.
Follow the manufacturer’s instructions on the label or in the package.
Chlorine dioxide tablets can kill germs, including Cryptosporidium, if you follow the manufacturer’s instructions correctly.
Ultraviolet light (UV light) can be used to kill some germs.
Portable units that deliver a measured dose of UV light help disinfect small amounts of clear water. UV light does not work well on cloudy water because small particles may block germs from the light.
If the water is cloudy, first filter it through a clean cloth, paper towel, or coffee filter OR allow it to settle. Then, draw off the clear water and disinfect it using the UV light.
Always follow the manufacturer’s instructions.
In emergencies, the sun’s rays can improve the quality of water. This method may reduce some germs in the water.
To disinfect water using the sun:
Fill clean and clear plastic bottles with clear water. Solar disinfection is not as effective on cloudy water because small particles may block germs from the light.
If the water is cloudy, first filter it through a clean cloth, paper towel, or coffee filter OR allow it to settle. Then, draw off the clear water and disinfect that water using the sun.
Lay the bottles down on their side and in the sun for 6 hours (if sunny) or 2 days (if cloudy). Laying down the bottles allows the sun’s rays to disinfect the water inside more effectively.
Putting the bottles on a dark surface will also help the sun’s rays disinfect the water more effectively.
No, boiling water is 212 °F (100 °C) Domestic hot - The temperature used during testing is 60 +/- 2°C (140 +/- 4 °F) and appears in Listings as "D. Hot". This is intended to apply to product applications where the product is used for either cold (ambient temperatures) or hot water up to domestic hot temperatures.
The tank smells like a candle?
Freshly made tanks may smell but it will disappear over time with exposure to air and water.
Class A Customs does not and can not recommend using a tank for fresh or drinking water after a contaminate such as fuel (gasoline, diesel or any other type of fuel) has been in the tank.
No, the health risks from using a previously used waste water tank for fresh or drinking water are extremely high and can not be recommended. Waste water tanks are also made from recycled materials and there is no guarantee if another material (paint / glue/ etc.) has been recycled along with the material, Waste Water Tanks are not for fresh or drinking water use.