Plastic Clamp to Vinyl Tube Fitting

[Samina]

Hey so I have a silly question but bear with me!

I am finally adding a sump to my system and I have gathered almost everything I need. I have the plumbing almost done and went with black vinyl tubing. The return is 3/4” and the drain is 1”. I bought plastic clamps for the tubing and am trying to figure them out. I bought 1”, 3/4”, and even 1/2” clamps and none of them fit the 3/4” black vinyl tubing for the return. The 1/2” and 3/4” seem too small and the 1” is way too large. Is there something I am missing when it comes to these clamps and these vinyl hoses? The only way the 3/4” clamp will work and fit on the 3/4” tube is by me putting it on there directly below the beginning of the barn fittings. Is that where they are supposed to be? Thanks for any help

 

[sundog101]

The 3/4” should fit the 3/4” fitting. Do you have a photo?

 

[Samina]

I actually don’t have a real pic of what I have but here is what I purchased.

 

[Samina]

The clamp fits onto the tubing but will not close if it is over the barb portion of the fitting

 

[don_chuwish]

That 3/4" tubing must be very thick walled, can you measure how thick once it's on the barbs? A quick search turned up some 5/8" ratchet clamps that might work.

 

[Samina]

The wall of tubing is 5mm thick. I am not sure how to measure it with the barbed fitting in it. I will order some 5/8” clamps and try those.

 

[Samina]

So I looked into the 5/8” vs 3/4” diameters and 3/4” tubing is actually wider so the 5/8” clamps will definitely not work. The 3/4” clamps are not fitting.

It’s like I need a size in between the 1” and 3/4”. This is so confusing. How to people use these plastic clamps with these vinyl hoses? I wouldn’t think I bought hoses that are too thick walled as I bought them from marine depot so they are supposed to be the ones for this purpose, am I right. This shouldn’t be this difficult lol

 

[cromag27 Verified Sponsor]

when picking out hose clamps you need to look at the diameter both opened and closed. some hardware stores like ace carry these. maybe you can bring a piece of hose with you to test.

 

[coryjac0b]

Are these connections going to be submerged? If they aren't, some stainless hose clamps would work fine. Just don't over tighten them.

 

[tank o tang]

The 1" and 3/4" is most likely your i.d or inner diameter. Just take a tape measure or ruler and measure the tube outside to outside at the cut end. That's what size clamp you will need also known as o.d. outer diameter.

 

[MaiReef]

heat the tubing and then clamp it. The heat will temporarily soften the tubing. Just don't heat the clamp.
hairdryer should work

 

[tank o tang]

Also if using hose barbs people usually step it up or adapt it to one size larger to make up for the extra restrictions the hose barbs add.

 

[Samina]

Thanks everyone! I ended up heating it again and trying the clamps and it did the trick! Had to crank it closed with a plier but all good.

I was debating about using the metal clamps because none of the connection are going to the submerged but I tried the heating and it ended up working so saves me another trip to the store! Thanks all [emoji3]

 

[johnthehermit]

If you can find them these are a better bet, in various sizes.
https://www.hcl-clamping.co.uk/nylo...e-hose-clamp-15-65mm-5060537086309.html?cid=3

 

[cracker]

If you can find them these are a better bet, in various sizes.
https://www.hcl-clamping.co.uk/nylo...e-hose-clamp-15-65mm-5060537086309.html?cid=3

Those look cool lots of uses.

 

[Samina]

If you can find them these are a better bet, in various sizes.
https://www.hcl-clamping.co.uk/nylo...e-hose-clamp-15-65mm-5060537086309.html?cid=3

Oh that would’ve worked! I should have bought that in the first place. I would’ve saved a lot of time and hand cramps!

 

[don_chuwish]

So I looked into the 5/8” vs 3/4” diameters and 3/4” tubing is actually wider so the 5/8” clamps will definitely not work. The 3/4” clamps are not fitting.

It’s like I need a size in between the 1” and 3/4”. This is so confusing. How to people use these plastic clamps with these vinyl hoses? I wouldn’t think I bought hoses that are too thick walled as I bought them from marine depot so they are supposed to be the ones for this purpose, am I right. This shouldn’t be this difficult lol

Silly me, I’d gone searching for 7/8” and didn’t even notice that the results were 5/8”. Even retyped 5/8” without thinking.

 

[Philt56]

I bought these for 3/4” ID 1” OD silicone hose. Yes they need pliers to close them tight and really hard to undo them.

https://www.amazon.com/Heavy-Double-Gripping-Nylon-Clamps/dp/B007R5V2HQ

 

[Celtic_Fox]

If you can find them these are a better bet, in various sizes.
https://www.hcl-clamping.co.uk/nylo...e-hose-clamp-15-65mm-5060537086309.html?cid=3

Awesome link to the Nylon Worm drive - Thanks... Makes me kind of want to replace the perfectly good clamps I have. (Where were you with that link a couple of years ago? ;-)

Anyway, for anyone still interested, I found a link to their USA store.

http://www.hcl-clamping.com/Plastic-Worm-Drive-Hose-Clamp-P18