Delta bathroom faucets come in two styles, single handle and double handle. Both have connections for the hot and cold water that comes from the two water pipes under the sink. To connect the faucet to these pipes, use flexible supply lines. There are several types to consider and each offers benefits to your delta faucet.
Ball Nose Supply Lines
A ball nose supply line has a ball on the end and it slides into the open end of the Delta faucet. A coupling nut slides up the hose and screws the ball tight into the Delta connection. Since dual handle Delta faucets include this nut, using a ball nose connector is a good idea. This type of supply line prevents leaks from occurring along the seam of the faucet and supply hose, because the ball plugs and seals the connection. It still allows water to flow into the faucet at full force, however it requires more force to make a tight connection. A wrench is necessary to connect this type of supply line.
IPS Faucet Connector
An IPS faucet connector is another option with Delta faucets. This is the same connector used with a vast number of other faucets, however, it is extremely useful with Deltas. The IPS faucet connector (IPS stands for iron pipe size) has a flexible hose with a ball head and a brass coupling that threads onto the faucet base. With this assembly, the coupling is already installed on the supply line. Simply thread the coupling onto the base of the faucet and tighten it with a wrench. Use a 1/2-inch size IPS faucet hose.
Metal Braided Supply Line
A metal braided supply line comes with its own coupling connector. It is made of braided, flexible metal that curves and bends with ease. This type of supply line is very durable and withstands dents and dings from items underneath the cabinet. Use this if you are concerned about damage to your supply line, or if you have a commercial faucet in a heavy use area. As long as the connector is 1/2 inch, it works perfectly with Delta bathroom faucets.
Plastic Tubing is another option for Delta faucets. The only limitation is the plastic tubing must have at least one 1/2-inch connector. Delta faucets all accept 1/2-inch connectors. Plastic tubing comes with metal braid inside the plastic. This provides some additional protection, but since the Delta faucet does not put any extra pressure on the supply line through its operation, this is only necessary if you are worried about external forces damaging the line.
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