Are there visible contaminants floating in your water or do you notice a strange odor? Your water could be contaminated. While some tap water might be safe to drink, it really comes down to where the water is coming from. In the Los Angeles area, unfiltered tap water is rarely safe to consume or use on its own.

At Monkey Wrench Plumbing, Heating, Air & Electric, a Monkey Wrench Plumbing, Heating, Air & Electric entity, we can test your water and determine if you would benefit from a water filtration system. We are an authorized dealer of industry-leading manufacturer Evolve, ensuring reliable, durable, and easy to maintain systems.

Reverse Osmosis System Costs

An under-sink reverse osmosis (RO) system is a great option if you want high-quality drinking water right from the tap. “Starting at” pricing varies based on the space under the sink and the installation setup.


Installing an under-sink RO system typically takes 2–3 hours and gives you purified drinking water right at the kitchen tap—better taste, better quality, and less reliance on bottled water.

Final pricing can vary based on:

  • Sink and cabinet space
  • Countertop modifications for the new RO faucet
  • Drain hookup configuration
  • Number of filter stages