Latest Frequently Asked Questions
What is the diameter of the Cherne Disc Seal bypass?
2 inches.
How many bladders come with the Cherne Disc Seal?
Each disc seal will include a double bladder. This means two bladders will be included in the purchase of each disc seal. The double bladders are engineered to provide a leakproof seal.
With the weights varying, how has Cherne made it easier to use to use the Cherne Disc Seal?
Cherne has designed the disc seals by using a lightweight, corrosion-resistant aluminum. The disc seals also include handles that assist for easy transporting and installation.
What are the different Cherne Disc Seal sizes offered?
The disc seal sizes range from 24 inches to 96 inches.
Part Number
Disc Seal Size
Max Back Pressure
Bypass Diameter
Weight
102418
24 IN
5 PSI
2 IN
65.52 LB
102718
27 IN
5 PSI
2 IN
74.72 LB
103018
30 IN
5 PSI
2 IN
85.07 LB
103318
33 IN
5 PSI
2 IN
95.05 LB
103618
36 IN
5 PSI
2 IN
105.38 LB
103918
39 IN
5 PSI
2 IN
126.72 LB
104218
42 IN
5 PSI
2 IN
138.35 LB
104518
45 IN
5 PSI
2 IN
150.32 LB
104818
48 IN
5 PSI
2 IN
162.69 LB
105418
54 IN
5 PSI
2 IN
188.45 LB
106018
60 IN
5 PSI
2 IN
215.58 LB
106618
66 IN
5 PSI
2 IN
244.06 LB
107218
72 IN
5 PSI
2 IN
329.34 LB
107818
78 IN
5 PSI
2 IN
367.29 LB
108418
84 IN
5 PSI
2 IN
405 LB
109018
90 IN
5 PSI
2 IN
444.39 LB
109618
96 IN
5 PSI
2 IN
485.13 LB
What is the maximum back pressure for Cherne Disc Seals?
5 PSI.
What is the purpose for the Cherne Disc Seals?
Cherne Disc Seals are designed to block flow or provide bypass flow in underground pipes with a low backpressure. Used for pipe construction, rehabilitation, cleaning and testing, these plugs can be separated into two halves to effortlessly fit through any manhole.
What is the length of time needed to test a joint with no more than 1 PSI drop?
5 seconds
Can I get help with a joint tester?
Yes. There is a video on the Cherne page on YouTube that demonstrates how a joint tester works. Owner’s Manuals with specific instructions on assembling and using Cherne Joint Testers can be found in technical section of the Cherne website.
What is the shelf life of smoke bombs and liquid smoke?
Smoke bombs have a one year shelf life from the date of manufacture. The shelf life on the mineral oil used in liquid smoke is indefinite.
What is the shelf life of liquid smoke?
The shelf life on the mineral oil used in liquid smoke is indefinite.
Does installing a Sink Hole Cover create a water tight seal?
The Sink Hole Cover will not achieve a water tight seal on its own, and an approved silicone product will have to be applied in between the sink surface and the Sink Hole Cover.
What materials are used to make ice maker outlet boxes?
The WMOB and IMOB are made of a High Impact Polystyrene.