Plumbing Supplies Near Me in Ireland: Top Merchants Guide

Whether you’re fitting out a new build or patching a Sunday morning leak, finding reliable plumbing supplies fast matters. Ireland has a solid network of merchants — from trade-only specialists to seven-day-a-week chains — but the options aren’t always obvious unless you know where to look. This guide maps the suppliers worth knowing about, what they stock, and how to choose the right one for the job.

Ireland’s leading supplier: Heat Merchants · Trusted by trade pros: Chadwicks · Stores open 7 days: Screwfix · Three locations: Greenline Plumbing Supplies · Plumbing category focus: Pipes & Fittings

Heat Merchants leads the market, Chadwicks dominates nationwide physical coverage, and Screwfix wins on speed — here’s how the suppliers compare on the ground.

What products does Heat Merchants sell?

Heat Merchants positions itself as Ireland’s leading supplier of heating, plumbing and renewable energy solutions to trade customers, serving both domestic and commercial projects (Heat Merchants). Their product range spans the core categories that professional plumbers reach for daily.

Pipes & Fittings

The pipes and fittings category sits at the heart of what Heat Merchants supplies. This covers everything from copper and plastic pipework to compression and push-fit fittings for every junction point in a system. Drainage products round out the category, handling waste removal from sinks, showers and appliances.

Pipe Systems

Beyond individual components, Heat Merchants stocks complete pipe systems designed for faster installation on larger projects. These pre-engineered solutions reduce fieldwork and are particularly useful for new builds or commercial fit-outs where speed matters.

Drainage

Drainage supplies at Heat Merchants include soil pipes, underground drainage systems, and the fittings needed to connect interior plumbing to municipal or septic infrastructure. Products are available for both new installations and replacement work.

The implication: Heat Merchants operates as a full-spectrum trade supplier rather than a spot-buy outlet. Plumbers working on heating systems, domestic renovations or commercial contracts can source the majority of their materials from a single account, which streamlines ordering on ongoing projects.

Is Screwfix a plumbers merchant?

Screwfix Ireland operates primarily as a retail and trade supply chain rather than a traditional plumbers merchant, though it stocks a credible range of plumbing products (Screwfix Ireland). The distinction matters depending on what you’re buying and whether you need specialist guidance.

Heating & Plumbing Range

Screwfix Ireland carries heating and plumbing supplies covering the basics that both tradespeople and DIY customers need. Products include pipe and fittings, bathroom accessories, taps, valves and associated hardware. The range is practical rather than specialised — it’s the right place for a ball valve or a replacement tap washer rather than bespoke engineering components.

Store Locations

Screwfix differentiates itself on convenience. Stores are open seven days a week, online ordering is available, and collection takes as little as 1 minute from the time you arrive at the counter (Screwfix Ireland). Delivery to home or site runs 2–3 working days, which beats many traditional merchants who only offer trade counter collection. Ireland has multiple Screwfix locations, with stores in Sligo and other centres.

The catch: Screwfix competes on speed and convenience, not technical depth. For a plumber who needs an obscure fitting or bespoke advice on a complex installation, Heat Merchants or PTS will serve better. For a tradie who forgot a tap seat and needs it before the morning job, Screwfix is the right call.

Who owns Greenline plumbing?

The exact ownership structure of Greenline Plumbing Supplies is not publicly confirmed in available records, making precise attribution difficult. However, the company has established itself as an independent operator with a clear regional identity.

Store Expansion

Greenline Plumbing Supplies has recently expanded with the opening of a third store, strengthening its presence in the Cavan-Navan corridor (Construction Ireland Directory). This growth signals investment in the regional trade market and suggests a business with healthy cash flow and a solid customer base.

Locations

Greenline operates across three key locations: Cavan, Navan and Carrick-on-Shannon (Construction Ireland Directory). The company also runs an online shop, which extends reach beyond its physical footprint. The geographic spread covers a meaningful chunk of the Midlands and North East, areas that are sometimes underserved by the larger national chains.

What this means: Greenline positions itself as a regional trade specialist. The lack of public ownership disclosure is typical for independent merchants — family-owned or privately held plumbing businesses often operate without formalised investor structures in the public domain. For plumbers working in the Cavan-Navan-Carrick corridor, Greenline is worth knowing about precisely because it’s filling a gap the big chains haven’t covered.

What is the 135 rule for plumbing?

The 135 rule in plumbing refers to a slope specification for drainpipes — specifically, the minimum fall a pipe must maintain to ensure self-cleansing velocity without holding solids. It is often cited by training providers and plumbing professionals as a practical on-site reference.

Rule Explanation

Under the 135 rule, a 100mm sewer pipe requires a minimum fall that allows waste to flow at a speed sufficient to keep the pipe self-cleansing. The actual ratio varies by pipe diameter; for a 100mm pipe the standard gradient is often expressed as 1 in 150, though the “135” label reflects specific regulatory contexts or training frameworks (Platinum Plumber). The key principle is that too shallow a slope lets waste settle and cause blockages; too steep creates problems with air traps and pipe wear.

Application

In practice, the 135 rule applies to underground drainage runs where gravity-fed systems move waste from a building to the main sewer or septic field. Plumbers and groundworkers use the ratio to set gradients before backfilling, and building control officers reference it during inspections. The rule is particularly relevant for new builds and extensions where drainage routes are being designed from scratch.

The trade-off: Getting the gradient right matters more than most customers realise. A slope that’s slightly off won’t fail an inspection in the short term but can cause recurring drainage problems years later, at which point remediation involves digging up external pipework — an expensive fix that proper initial installation avoids.

What pipes do you not want in your house?

Certain piping materials carry known risks that make them undesirable in residential plumbing systems. If you’re buying a property or maintaining an older home, it’s worth knowing what to look for — and what to replace.

Materials to Avoid

Three pipe materials stand out as problematic: polybutylene, galvanised steel, and lead. Polybutylene, widely used in Ireland and the UK from the 1970s through the 1990s, is prone to brittleness and joint failure, particularly at plastic-to-metal transitions. Galvanised steel, common in pre-1970s properties, corrodes internally over time, restricting flow and producing discoloured water. Lead pipes, found in very old properties, pose a direct health risk and should be replaced immediately (The Plumbing Joint).

Alternatives

Modern standards favour copper for hot and cold water distribution, and cross-linked polyethylene (PEX) for flexible branch runs. For drainage, uPVC has largely replaced older materials due to its chemical resistance and ease of installation. These materials carry significantly lower failure risk and are supported by current building regulations.

Why this matters: A pipe material problem discovered at purchase or renovation stage is manageable. The same problem discovered after moving in — or worse, during an insurance claim — is not. Plumbers doing pre-purchase surveys should flag all three risk materials clearly, and recommend replacement as standard practice.

Regional coverage across Ireland

Seven plumbing supply entities cover distinct geographic zones, with coverage depth varying significantly between regions. PTS dominates Northern Ireland with seven branches, while Dublin has the densest concentration of any city.

The pattern is clear: Dublin has the deepest coverage, with every major player maintaining a presence. Northern Ireland is well-served by PTS Plumbing Trade Supplies, which operates seven branches including a primary Belfast location at 107–127 Grosvenor Road (PTS Plumbing Trade Supplies). The Midlands and North East are better covered than they were a few years ago, thanks to Greenline’s expansion, but the south-west and smaller towns still lean more heavily on Chadwicks and online suppliers.

“We supply the best quality plumbing supplies and plumbing accessories including hot water cylinders, kitchen sinks, boilers & burners and more to Ireland and the UK.”

— Plumbing Products Ireland

“Heat Merchants is Ireland’s leading supplier of Heating, Plumbing and Renewable Energy solutions to trade customers, for domestic and commercial projects.”

— Heat Merchants

For plumbers and property owners in Ireland, the choice of supplier depends less on who is closest and more on what the job requires. Heat Merchants leads on specialist trade expertise and product breadth. Chadwicks wins on nationwide physical presence and dual trade-DIY accessibility. PTS dominates Northern Ireland with its seven-branch footprint. Screwfix is the answer when speed matters more than advice. And independent merchants like PJ Nolan offer the personal service and fair pricing ethos that large chains struggle to replicate.

Related reading: Pizza Place Near Me: Ireland Delivery & Takeaway Guide

While Heat Merchants and Chadwicks dominate in Dublin and Cork, Ireland’s best store options highlights additional reliable choices for quick restocks across Ireland.

Frequently asked questions