Delta Kitchen Faucet Water Line Connections

Connect the Delta single handle kitchen faucet water lines to complete the faucet installation. This series is continued from How to Install a Delta Single Handle Kitchen Faucet. Also see How to Replace a Kitchen Faucet to disconnect and remove the old faucet.

Delta Kitchen Faucet Water Line Connections

The water lines are hanging under the sink after mounting the faucet:

Delta Single Handle Kitchen Faucet Installation - Spray Hose with Hot & Cold Water Tubes

Delta Single Handle Kitchen Faucet Installation – Spray Hose with Hot & Cold Water Tubes

Delta Kitchen Faucet Custom Fit Connections

The hot and cold water supply tubes are quite long to suit most any plumbing arrangement. If the tubes are too long they can either be looped (minimum 8 inch diameter loop) or cut-to-fit per Figure 2 on page 5 of the Delta Leland installation instructions. I tried making a loop but it would be too small which can stress and crack the tubes. Therefore I’ll follow the Custom Fit Connections procedure on page 6 of the instructions to cut the tubes shorter.

The hot (red) and cold (blue) PEX supply tubes have 3/8 inch fittings. The hot water supply tube is shown next to the stop valve:

Delta Kitchen Faucet - Hot Water Tube with Factory Compression Fitting

Delta Kitchen Faucet – Hot Water Tube with Factory Compression Fitting

I won’t be able to use the red & blue factory fittings when I cut the tubes shorter. Instead, the Delta kit includes two Cut-To-Fit Plastic Sleeves part # RP50952 to seal the connection:

Delta Single Handle Kitchen Faucet Install - Hot & Cold Water Tubes with Cut to Fit Plastic Sleeves RP50952

Delta Single Handle Kitchen Faucet Install – Hot & Cold Water Tubes with Cut to Fit Plastic Sleeves RP50952

Caution: Delta’s instructions says the installer assumes all responsibility for creating a leak-free joint if the tubing is cut.

To cut the hot and cold water supply tubes to length:

  • Hold the tube next to the stop valve 3/8 inch inlet.
  • Make a mark on the tube about 1-1/2 inches longer than the valve inlet.
  • Cut the tube evenly with a utility knife or PEX Tube Cutter.
    A tube cutter is the easiest and surest way but a utility knife worked fine for me on this small tube.
  • Verify the cut is square and not slanted.
Delta Single Handle Kitchen Faucet Installation - Cut PEX Plastic Tube with Utility Knife

Delta Single Handle Kitchen Faucet Installation – Cut PEX Plastic Tube with Utility Knife

Slip the metal nut over the tube followed by the plastic sleeve. The wide end of the sleeve must face the nut for a leak-free connection:

Delta Single Handle Kitchen Faucet Installation - Nut and Plastic Sleeve on Supply Tube

Delta Single Handle Kitchen Faucet Installation – Nut and Plastic Sleeve on Supply Tube

You’ll need both hands for the next steps:

  • Hold the PEX tube straight and insert it in the stop valve until it touches the bottom of the hole.
  • Continue holding the tube straight & against the valve, then slide the plastic sleeve down to the stop valve inlet.
  • Tighten the nut by hand then an extra 1-1/2 to 2 turns with a wrench.
    Do not over tighten the nut because it can crush the plastic sleeve and cause a leak.

The completed hot and cold water faucet connections:

Delta Single Handle Kitchen Faucet - Hot & Cold PEX Tube Connections

Delta Single Handle Kitchen Faucet – Hot & Cold PEX Tube Connections

Note the practice cut I made on the cold water tube in the above photo.

Flush the Faucet Lines

Step 3 on page 7 of the installation instructions says to flush the supply lines by placing a bucket under faucet outlet tube, slowly open one stop valve at a time then open the faucet. It’s best to have a helper move the faucet handle while you’re under the sink holding the bucket and opening & closing the stop valves.

Close the stop valves after flushing the hot & cold water lines.

Delta Kitchen Faucet Sprayer Hose Connection

The sprayer hose is easy to connect and requires no tools.

Begin by sliding the hose weight over the end of the sprayer hose:

Delta Single Handle Kitchen Faucet - Insert Spray Hose through Weight

Delta Single Handle Kitchen Faucet – Insert Spray Hose through Weight

Lying on my back under the sink, I pressed the sprayer hose on the faucet outlet tube. This required both hands because I had to press hard to seat the connection:

Delta Single Handle Kitchen Faucet Installation - Outlet Tube and Spray Hose Fittings

Delta Single Handle Kitchen Faucet Installation – Outlet Tube and Spray Hose Fittings

The blue clip fits over the shoulders of the outlet tube and sprayer hose. The clip snaps on easily – if not the connection isn’t fully seated and you’ll have to press the two ends together some more:

Delta Single Handle Kitchen Faucet - Install Clip on Shoulder of Hose and Outlet Fittings

Delta Single Handle Kitchen Faucet – Install Clip on Shoulder of Hose and Outlet Fittings

The clip orientation doesn’t matter and it can be rotated around the joint:

Delta Single Handle Kitchen Faucet - Retaining Clip Installed on Hose and Outlet Fittings

Delta Single Handle Kitchen Faucet – Retaining Clip Installed on Hose and Outlet Fittings

Reconnect the Kitchen Sink Drain Plumbing

As explained in How to Replace a Kitchen Faucet the P-trap and garbage disposal drain pipes were removed for easier access under the sink. I bleached and cleaned the PVC drain pipes and slip washers before reassembling:

Kitchen Faucet Installation - Reconnect Drain Plumbing

Kitchen Faucet Installation – Reconnect Drain Plumbing

Delta Single Handle Kitchen Faucet Testing

With the drain pipes reconnected I turned on the stop valves then ran the faucet and checked for leaks:

Delta Single Handle Kitchen Faucet Installed

Delta Single Handle Kitchen Faucet Installed

The pull-down sprayer features the MagnaTite magnetic docking system that holds the sprayer head firmly in place. A slight twist of the sprayer head causes the magnets to repel releasing the sprayer. A button on the sprayer switches between stream and spray functions:

Delta Single Kitchen Faucet - Magnetic Dock Pull Down Sprayer

Delta Single Kitchen Faucet – Magnetic Dock Pull Down Sprayer

Best of all my wife is pleased with the new faucet!

Delta Kitchen Faucet Aerator Removal

Mineral deposits might clog the aerator after a time. The Delta faucet includes a wrench to unscrew the aerator:

Delta Kitchen Faucet - Spray Head and Aerator Wrench

Delta Kitchen Faucet – Spray Head and Aerator Wrench

The aerator can be replaced or soaked in vinegar to remove the mineral buildup:

Delta Kitchen Faucet - Aerator Removed

Delta Kitchen Faucet – Aerator Removed

Next I’ll install the Delta dish soap dispenser (coming soon!).

Best,

Bob Jackson

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4 Responses to Delta Kitchen Faucet Water Line Connections

  1. Ram October 15, 2016 at 7:25 pm #

    Kudos to you Bob. Your site is the best on the internet (cant even find youtube video) with superb images. With your website’s help, wife and I (1st time homeowners) slowly managed to install a new flex hose from Delta (due to recall owing to deterioration of inside black rubber in black hose).

    Question: After I remove the Aerator, can I install an adapter and screw on an Enviro 10 stage filter?

  2. Darnell January 14, 2017 at 12:50 pm #

    Hi, How about if i cut the hot water tube to short . any recommendation? Best possibly outcome for no leakage?

    • Bob Jackson January 14, 2017 at 8:52 pm #

      If the PEX tube was cut too short then you’ll need to buy a length of PEX tubing and a coupling fitting to splice in a new section of tube.

      I’m unable to measure the faucet PEX tube diameter at the moment, but I believe a coupling like the Brasscraft 3/8 x 3/8 inch compression coupling fitting should work.

      Since the tube is already too short, cut off another 4 inches and take it to the home improvement store to match it to the correct PEX tubing and coupling.

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