To refill a soap dispenser, remove or open the container, pour in liquid soap (or soap mixed with water for foaming types), then reattach the pump and prime it with a few presses.

Basic pump soap dispenser

Most sink and bathroom countertop dispensers refill the same way.

  • Turn the pump top counterclockwise and pull it straight out of the bottle or built‑in container.
  • Slowly pour liquid hand soap or dish soap into the opening, aiming for the center so it does not smear along the rim and overflow.
  • Stop when the bottle is almost full, leaving a little space so inserting the pump does not force soap out.
  • Screw the pump back on snugly, then press the pump several times until soap starts coming out.

Built‑in kitchen sink dispenser (from under or top)

Many kitchen faucets have a built‑in dispenser with a small pump above the counter and a bottle underneath.

  • Option 1 – refill from under the sink:
    • Unscrew the plastic bottle from the pump stem under the sink.
    • Fill the bottle at the sink or with a funnel, then screw it back on and test the pump.
  • Option 2 – refill from the top (if designed for it):
    • Pull the pump straight up to remove it.
    • Pour soap into the opening from above using a narrow spout or funnel, then reinsert the pump and prime.

Commercial / wall‑mounted dispensers

Wall units in bathrooms usually take cartridges or internal reservoirs.

  • Open the front cover by pressing the latch or side buttons, depending on model.
  • If it uses a cartridge:
    • Press the release, remove the empty refill, remove the cap from the new one, then push it firmly into place until it clicks.
  • If it uses a refillable reservoir:
    • Pour bulk soap into the tank up to the fill line, then close the cover securely.
  • Press the pump or sensor a few times to bring soap into the dispensing mechanism.

Foaming soap dispensers

Foaming pumps need thinned soap to work properly.

  • Fill only about one‑eighth to one‑quarter of the bottle with regular liquid soap.
  • Fill the rest with warm water, pouring slowly down the inside wall so it does not foam up too much.
  • Gently swirl (do not shake hard) to mix, reattach the pump, and pump several times until foam appears.

Simple mess‑free tips

Little adjustments make refilling cleaner and easier.

  • Use a small funnel or a bottle with a narrow spout to avoid spills and drips on the rim.
  • Leave 1–2 cm of space at the top so reinstalling the pump does not cause overflow.
  • Wipe any soap on the threads or outside of the bottle so the pump screws on smoothly and the bottle is not slippery.
  • For kitchen sinks you refill often, some people attach a long tube from the pump directly into a large jug of soap under the sink to avoid frequent refills.

TL;DR: Open or remove the pump, pour soap in slowly (diluted with water if it is a foaming dispenser), leave a bit of space at the top, close it up, and pump until soap comes out.

Information gathered from public forums or data available on the internet and portrayed here.