Weatherproofing pipes coming out from wall

[Bent17]

Hi all - Need some DIY help... So I am drilling a 4 inch wide hole from the back side through to the otherside of my wall which is the terrace. I will be passing through 2 pipes and power cable for my chiller and the RO topup pipe for my reservoir. Now I was thinking of having something like this, however I would like to close / seal the hole so that no dust / rain passes back throughout the hole into the cabinet.. Any ideas?

 

[blaxsun]

You could get a cap 3D-printed to match the dimensions of the tubes that would pass through the pipe. Then you'd also be able to remove it for maintenance.

 

[Bent17]

or maybe I pass them through a plastic bulkhead, but need to see how to seal the hole

 

[AlexG]

Normally if it is going through outside if there are small areas to fill silicone can be used to seal but, if there are larger voids then some spray foam would be the way to go. If you have any concerns that critters might try to chew through to get in the house then a cut plastic/metal mesh cover would be ideal then seal over the top of that.

 

[All_talk]

What about some sort of grommet:

https://www.google.com/search?q=cab...WZAzQIHVwkAI0Q4lYoAXoECAEQHw&biw=1628&bih=779
Or maybe something like this:

https://raisedflooringexperts.com/product/products/grommets/4-wall-pass-through-with-edpm-gaskets/
I would probably just cut my own gasket from some dense foam (think yoga mat) to fit the arrangement of tubes and wires. (forgive my crude sketch).

 

[Bent17]

Thanks for that! My only worry is that the x2 16mm piping going to the chiller on the otherside might need a bit of bending and in time will cause some stress on the piping. Either I change ot every year to be safe or come up with something

 

[WVNed]

Looks like a job for spray foam to me. Poke a paper towel into the pipe from inside after arranging the things passing through so the slack is where you need it. The paper towel will keep the entire pipe from being filled completely. Seal it with the foam.

 

[Bent17]

Y

Looks like a job for spray foam to me. Poke a paper towel into the pipe from inside after arranging the things passing through so the slack is where you need it. The paper towel will keep the entire pipe from being filled completely. Seal it with the foam.

Problem is if I need to pass more things in the future..

 

[WVNed]

Problem is if I need to pass more things in the future..

Then you poke it out, add the things and redo it. Spray foam dries to a solid foam but it can be cut or pushed out. It isnt a hard mass.

 

[Bent17]

Then you poke it out, add the things and redo it. Spray foam dries to a solid foam but it can be cut or pushed out. It isnt a hard mass.

Sweet ok thanks never used it.. but yeah i know only a bit as it expands fast!

What about the bending of pipes? Any idea how I can save them from bending pressure?

 

[WVNed]

Sweet ok thanks never used it.. but yeah i know only a bit as it expands fast!

What about the bending of pipes? Any idea how I can save them from bending pressure?

Not sure what you mean?
Sagging from their own weight?
You have to support them somehow or bundle them so they all resist movement together. Put them in tight fitting PVC pipe. Add a splint made to shape and wrap them together in electrical tape.
Sometimes you have to get creative.

 

[All_talk]

Thanks for that! My only worry is that the x2 16mm piping going to the chiller on the otherside might need a bit of bending and in time will cause some stress on the piping. Either I change ot every year to be safe or come up with something

I too always consider serviceability, spray foam or the like would not be my first choice, easy now, not so easy later when you want to change out a line or reconfigure something. Some sort of mechanical assembly that you can disassembly will be more time/money/effort now, but likely less total investment when you deal with it later.

 

[WVNed]

Not if you back it with paper and the foam is only 2 inches thick. You used to be able to get non hardening puttys that are re-enterable and plug the pipe. They looked like modeling clay.

Gardner Bender Duct Seal Compound Plugs is a dough-like material that is easy to handle. This material helps seal and protect gaps, holes and conduit openings against dust, moisture, drafts and noise. This material is non-toxic, non-corrosive and non-staining. This seal can be used in temperatures that range between -20 degree F up to 350 degree F.

• Dough-like material
• Helps seal conduit openings, gaps and holes against drafts, dust, moisture and noise
• Easy to handle
• Simple to install
• Under normal conditions the material will not harden or form a skin

 

[All_talk]

The putty is a thought.

The spray foam is great for one-and-done kinda stuff, but I was just imaging trying push and scrape out the foam with the tubes and wires still in the hole, but if its thin maybe not a big issue.

What about just packing in some fiberglass or poly insulation? maybe not the prettiest look (no worse that spray foam), and easy to remove if need be.

As for the chiller lines and bending, are you going to plumb water in and out of the chiller with PVC or soft line? Either should work, or a combination. I would included some unions or other disconnect points for service later.

 

[Bent17]

Was thinking of soft pipes

 

[All_talk]

If routing the tubes causes kinks, using 45 or 90 deg. fittings should help. But if there are a lot of twists and turns be sure your tubing size and pump are capable of the flow rate you need.

 

[Bent17]

If routing the tubes causes kinks, using 45 or 90 deg. fittings should help. But if there are a lot of twists and turns be sure your tubing size and pump are capable of the flow rate you need.

no twists, from sump through the hole and into the chiller so around 2x 45 bends only

 

[SteveMM62Reef]

Schedule 80 will still be around after you are long gone, LOL PVC Electrical Conduit has UV Stabilizers in it. I have them where they are Sleeves to pass piping through for the Heat-pump, Sump discharge, they are over 30 years old and are not even close to failing. I have a railing on my Deck steps, made from PVC Conduit that is over 20 years old. It’s going to outlast the Brass Plated Brackets.