Custom PP-R Manifolds

A PP-R manifold is a distribution/collection component made from PP-R (polypropylene random copolymer) pipe by fusion welding, which distributes the incoming flow evenly to several branches. It is corrosion-free, does not build up limescale and is lightweight; Novus manufactures it in header sizes Ø40 – Ø400 to suit the length and branch layout of your project.

• Header size: Ø40 mm – Ø400 mm
• Header length and branches: project-specific
• Operating temperature: 70 °C continuous operation (80 °C short-term)
• Pressure class: PN 10 – PN 20 (depending on series and temperature)
• Outlet connection: PP-R weld end (unthreaded), brass male thread, brass female thread, union, flanged or with valve
• Price: project-specific (quoted to your dimensions)

Design your own manifold → Choose the dimensions, download your A4 technical drawing and get a quote via WhatsApp.

What does a PP-R manifold do?

A manifold header made from polypropylene (PP-R) pipe and joined by fusion (socket/butt) welding. It is corrosion-free, does not build up limescale and is lightweight; it is preferred for hot and cold domestic water and heating–cooling lines. The job of the manifold is to receive the flow from the boiler/pump line at a reduced velocity and distribute it evenly to the branches. The larger the header diameter, the lower the velocity, and the lower the pressure loss, noise and imbalance between the branches.

White and green PP-R options and a glass-fiber reinforced (FG) header are produced on request.

Key features

• Complete resistance to corrosion and scaling
• Much lighter than a metal manifold, easy to install
• Seal-free, leak-tight joints by fusion welding
• White/green PP-R and glass-fiber reinforced (FG) header options

PP-R manifold size and capacity table

The values below are calculated assuming a water velocity of 1.0–1.5 m/s and ΔT = 20 K. If the ΔT of the heating circuit is different, the capacity changes in direct proportion; the final selection is made according to the system design calculation.

How to select the manifold diameter

Selection is made in three steps:

1. Find the total flow rate. For heating: Q (m³/h) = P (kW) / (1.163 × ΔT).
2. Limit the velocity. Aim for 1.0–1.5 m/s in the header: Q = A × v × 3600.
3. Check the cross-section ratio. The header cross-section should be at least 1.5 times the total cross-section of the branches.

Example: a Ø160 mm header is suitable for a flow rate of 48.5 – 72.7 m³/h and, at ΔT = 20 K, a thermal output of 1.13 – 1.69 MW. If you would rather not calculate by hand, the configurator runs the same check automatically with every change and suggests the next size up if needed.

Branches, connections and accessories

Branch sizes: 20 · 25 · 32 · 40 · 50 · 63 · 75 · 90 · 110 mm. Outlet connections are made as PP-R weld end (unthreaded), brass male thread, brass female thread, union, flanged or with valve; branches of different sizes and types can be combined on the same header. Branch positions are defined by center dimensions measured from the left or right end of the header; if valves, unions or meters are to be fitted, the center-to-center spacing is set to the width of the fitting plus an installation allowance.

Parts added on request: ball/butterfly valves, pressure gauges and thermometer pockets, drain valve, air vent connection, strainer, meter connection union, UPN/galvanized support legs, wall bracket, insulation and labeling.

Manufacturing, testing and delivery

The header and branches are machined to the dimensioned drawing and joined by fusion welding; a leak test is carried out after manufacturing. Delivery time depends on the size, the number of branches and the quantity; lead time and price are given with the quotation, per project.

Where are PP-R manifolds used?

boiler rooms · water meter banks · heating–cooling lines · solar thermal installations · housing developments · industrial installations

Other manifold types

The same project may call for a different material: Stainless steel manifolds · Galvanized manifolds · Black steel manifolds · HDPE manifolds. For a comparison and selection criteria, see the manifold selection guide.

Find the manifold type you need

• Hot water manifold — the PP-R header is suitable for 70 °C continuous operation
• Cold water manifold — no limescale buildup, no corrosion
• Domestic water manifold — in-apartment and riser distribution
• Heating water manifold — low-temperature heating circuits

Frequently asked questions

Last updated: September 20, 2026 · Prepared by: Novus Energy technical team — manifold manufacturing and metering systems. For size and capacity verification: WhatsApp or +90 216 642 42 66.