Whole-Home vs. Under-Sink Water Filtration Systems: Which is Best?

Wade Roberts Plumbing • July 15, 2026

Once you have decided to improve the water quality in your Victoria home, the next big question is deciding which type of system to install. With so many options on the market, choosing the right water filter can feel overwhelming. Should you filter the water for the entire house, or just focus on the kitchen sink where you get your drinking water?


At Wade Roberts Plumbing, we know that every home and budget is different. We believe in providing clear, upfront options so you can make the best choice for your family. Understanding the key differences between whole-home and under-sink filtration systems is the easiest way to narrow down your decision.


Under-Sink Water Filtration Systems


Under-sink filters, also known as point-of-use systems, are installed directly beneath a specific faucet, usually in the kitchen. They filter water right before it comes out of the tap.


Pros of Under-Sink Systems:

• They are highly cost-effective to purchase and install.

• They provide intensely targeted filtration, making them excellent for drinking and cooking water.

• Replacement cartridges are generally affordable and easy to swap out.


Cons of Under-Sink Systems:

• They only filter water at one specific faucet.

• Your showers, washing machine, and dishwasher will still use unfiltered water.

• They take up space in the cabinet underneath your sink.


Whole-Home Water Filtration Systems


A whole-home filter, or point-of-entry system, is installed where your main water line enters the house. This means every single drop of water running through your plumbing is filtered before it reaches any faucet, appliance, or showerhead.


Pros of Whole-Home Systems:

• You get clean, filtered water from every tap and shower in the house.

• It protects your entire plumbing system and appliances from hard water scale and sediment.

• It improves indoor air quality by preventing chlorine vapors from escaping during hot showers.


Cons of Whole-Home Systems:

• They require a larger upfront investment for the unit and professional installation.

• They take up more space in your basement or utility room.

• The filtration might not be as fine-tuned for drinking water as a dedicated reverse osmosis under-sink unit.


Which Option is Right for You?


The best choice depends on your specific goals. If you are primarily concerned about the taste and safety of your drinking water, an under-sink system is an excellent, budget-friendly starting point. However, if you are dealing with hard water that is damaging your plumbing fixtures, drying out your skin, or leaving spots on your dishes, a whole-home system is the superior long-term investment.


Many homeowners actually choose to combine the two: a basic whole-home system to remove sediment and chlorine, paired with a specialized under-sink filter for pristine drinking water.


Frequently Asked Questions


Q: Can I install a water filtration system myself?


While some basic under-sink filters are DIY-friendly, whole-home systems require cutting into your main water supply line and should always be installed by a licensed plumber.


Q: Do water filters affect water pressure?


A properly sized and maintained filter should not noticeably reduce your water pressure. However, if you forget to change the filter cartridges, a clogged filter will slow down the flow.


Q: Do you offer discounts on water filter installations?


Yes! This July, Wade Roberts Plumbing is offering $50 off any professional water filter installation to help you achieve better water quality at home.


Let the Experts Guide You


Still unsure which system fits your lifestyle? The team at Wade Roberts Plumbing is ready to help. We provide customized, in-home consultations to test your water and recommend the perfect setup with honest, upfront pricing. 


Plus, for every filter we install this July, we help provide a water filter to a family overseas. Contact us today to upgrade your home’s water system and make a real difference!

Blue TDS meter standing in a glass by a kitchen sink faucet
By Wade Roberts Plumbing July 7, 2026
Wondering if your home needs a water filter? Learn the top signs of poor water quality and simple tests to ensure your family enjoys clean, safe water.
Technician working inside an open furnace cabinet with tools and exposed wiring
By Wade Roberts Plumbing June 23, 2026
Find out exactly what happens during a professional home gas safety visit. Learn how our gas-fitters check for leaks, inspect venting, and keep you safe.
Modern gas fireplace with bright flames behind a glass panel in a stone surround
By Wade Roberts Plumbing June 17, 2026
Beat the autumn rush! Discover why summer is the absolute best time to book your gas fireplace and furnace servicing in Victoria for a safe, warm winter.
Person turning a knob on a black gas stovetop in a bright kitchen
By Wade Roberts Plumbing June 9, 2026
Smelling gas in your home is an emergency. Learn the calm, clear steps to take if you suspect a gas leak in Victoria, BC, to keep your family completely safe.
Gloved hands adjusting a red valve on exposed plumbing pipes under a sink
By Wade Roberts Plumbing June 3, 2026
Get your Victoria home ready for summer with our BBQ gas readiness guide. Learn simple steps for safe gas grilling, leak prevention, and professional hookups.
Worker in red safety gear beside a large coiled white hose or cable
By Wade Roberts Plumbing May 26, 2026
Planning a Poly-B repipe in Victoria? Learn what to expect, from timelines and water shut-offs to drywall patching, for a smooth and stress-free project.
Exposed ceiling framing with white PVC pipes and red/blue plumbing lines in a house under construction
By Wade Roberts Plumbing May 20, 2026
Discover your Poly-B piping options in Victoria, BC. We explain monitoring, partial fixes, and full home repiping so you can make an informed, safe choice.
Hands using a red pipe cutter on a blue PVC pipe indoors
By Wade Roberts Plumbing May 12, 2026
Worried about your Poly-B pipes failing? Learn the hidden risk factors that cause Polybutylene degradation and how to protect your Victoria home today.
Show More