Planning Plumbing Systems for a New House: Key Considerations and Tips

Building a new house is a venture full of excitement, anticipation, and, admittedly, complexity. Among the countless considerations you’ll encounter, one of the most essential is planning the plumbing system. This critical infrastructure serves as the circulatory system of your home, supplying fresh water while removing waste, so it demands thoughtful preparation and execution. 

This blog post explores the key considerations and tips for planning plumbing systems when building a new home, from layout design and material selection to water conservation and future expansion.

Starting with the Blueprint: Layout and Design

Planning your plumbing system should coincide with the design phase of your new house. The blueprint of the house will inform the plumbing layout, which includes water supply lines, drainage systems, and fixture locations.

Plumbing Systems for a New House

Water supply lines transport fresh water from the public supply or well to your faucets, showers, and appliances. They should follow the most direct path from the source to each fixture to minimize cost and complexity.

Drainage systems, or DWV (drain-waste-vent) systems, carry waste and greywater away from your home. They must obey the laws of gravity, so careful planning must ensure each fixture is properly sloped towards the main sewer line. As part of the DWV system, vent pipes equalize air pressure within the drains to prevent water locks and help waste flow smoothly.

Consider the placement of your fixtures. A good rule of thumb is to group plumbing fixtures as much as possible. Known as a “wet wall” design, this practice simplifies the plumbing layout, reduces materials and labour costs, and makes maintenance easier.

Choosing Quality: Materials and Fixtures

Investing in high-quality materials is a wise long-term strategy for your plumbing system. While the upfront cost may be higher, quality materials are more durable and reduce the chance of leaks or other complications.

Piping materials range from PVC, PEX to copper, each with pros and cons. For example, PEX is flexible and easy to install, making it ideal for water supply lines. However, due to its corrosion resistance, PVC is better for the DWV system.

Selecting fixtures like faucets, showerheads, and toilets can be a mix of personal aesthetics and practical considerations. Always opt for high-efficiency models when available. They may be more expensive initially, but they will save on water bills and environmental impact over time.

Water Conservation: Efficient Systems

An efficient plumbing system optimizes water usage and reduces wastage. Consider installing low-flow fixtures like toilets, faucets, and showerheads, which can significantly reduce water consumption without sacrificing performance.

Tankless or on-demand water heaters are another effective measure. They heat water only when needed, reducing energy usage compared to traditional water heaters that always keep a large volume of water heated.

Plumbing Systems for a New House

Rainwater harvesting systems can also be integrated into your plumbing design. They collect and store rainwater for non-potable uses, such as irrigation and flushing toilets, lessening the load on your water supply.

Future-Proofing: Accommodate Future Expansion

A forward-looking approach to plumbing considers potential future expansion or modifications. While you may not require a certain feature or fixture now, circumstances might change in a few years.

Ensure your design has enough space for additional fixtures, especially in bathrooms and kitchens. If you’re installing a septic system, it should be sized to handle an increased load in case you expand the house later. Consider installing pipe sleeves for easy routing of new water lines.

Partner with Professionals

While planning, consulting with a professional plumber is beneficial, even if you’re a DIY enthusiast. Plumbing codes can be complex, and installation errors can lead to costly repairs. A licensed plumber will help ensure your system complies with local codes, is efficiently designed, and is correctly installed. They’ll bring experience and insights that can save you from future headaches.

Visit to learn more about one of the local companies with a proven track record. 

In conclusion, plumbing systems are integral to your new home’s infrastructure, demanding meticulous planning and execution. By considering the layout and design, choosing high-quality materials and fixtures, implementing water conservation measures, and accommodating future expansion, you’re laying the groundwork for a reliable and efficient plumbing system. Remember to partner with professional plumbers to harness their expertise and ensure a successful plumbing installation in your new home. With the right planning, your new home’s plumbing will provide comfort and efficiency for many years.