A dehumidifier is a device for the removal of moisture from the air. The copper pipe that is not connected is almost certainly a drain pipe. As the dehumidifier removes moisture from the air, it has to collect and then drain in some way. A drain pipe would handle the latter chore. Consult the manufacturer or a distributor for a manual or just some information.
When I have to connect copper to lead "D" I usually solder the copper to the lead or wipe a lead joint depending on the diameter To connect copper to cast iron ,.... If there is a hub I caulk the copper directly into the CI with oakum and poured lead (molten) OR one can solder / braze a female adapter fitting and screw the copper into a CI female fitting
Easiest way to connect lead to copper /brass is a wiped joint consisting 40 - 60 solder alloy as this gives a longer pasty range
To connect copper to PEX pipes, you can use a fitting called a PEX-to-copper adapter. This adapter typically has a PEX side that can be crimped onto the PEX pipe and a copper side that can be soldered or connected using a compression fitting to the copper pipe. Make sure to follow the manufacturer's instructions and use the appropriate tools for a secure and leak-free connection.
YOU thread or braze copper pipe Copper tubling you solder, braze, flaire, compression ring, mechincal joints
Yes
In order to connect a chromed steel pipe to a copper pipe, you will need a brass fitting. These two pipes will not fit into each other otherwise.
It is probably referring to the type of fitting. A fitting that is soldered to a copper pipe. It is called sweating when you use solder and a torch to connect copper pipe together or attach fittings to copper pipe.
NO but you will need some type of sealent OR braze or soldering
If you do connect copper pipe to galvanized pipe, you will need a dielectric coupling or else the galvanized pipe will corrode. Same with connecting galvanized pipe to brass fittings. Brass is an alloy that contains copper and therefore the same electrolytic properties will exist unless a dielectric coupling is used. Hope that helps you out.
If you had been advised why ask again?
To connect a copper propane pipe to a shutoff valve, you will need to use a threaded fitting that matches the size and type of the pipe and valve. Apply pipe dope or Teflon tape to the threads before connecting them. Tighten the fitting securely using a wrench or pliers to create a leak-proof connection.
You can often find a modern connector such as Sharkbite or Qwest fitting to do this.