PPR Fittings List to BOQ: Counting Pipe, Fittings and Waste

Most buyers arrive at a PPR fittings list from the wrong end. They have the catalogue open, they know a reducing tee from a reducing socket, and they still cannot tell the factory how many to send. The names are the easy part. The quantity beside each name is the part that decides whether the second delivery is a top-up order or an emergency one, and it is the part almost no PPR catalogue helps you with.

Why a PPR Fittings List Is Not a PPR Takeoff

Three different documents get called “the fittings list”, and confusing them is what produces a delivery that is 90% right and completely unusable. The first is the catalogue: every fitting the supplier makes, in every size. The second is the measured bill of quantities: what this project contains, expressed the way a standard says to express it. The third is the purchase order: what you actually buy, in the pack sizes and bar lengths the factory actually ships.

A catalogue can never become a purchase order directly, because it has no quantities in it. That sounds obvious written down. It stops being obvious at eleven at night when someone is copying part numbers into a spreadsheet and the elbow row is filled in from memory.

Where the shortfall actually surfaces

The pipe is almost never the problem. Pipe is measured in metres off a drawing, and metres are hard to get badly wrong. The shortfall lands on the parts that exist only where two things meet: the reducing tee at the branch nobody traced, the union either side of a valve that was counted as one item, the brass-insert transition where the system meets a metal riser. Those are low-value parts that stop a crew completely, and they are the parts a name-only list is structurally incapable of counting.

Who this method is for

This is a manual, drawing-led method, and it is honestly not the right tool for every reader. It suits the person who has to defend the number, not the person who needs a rough figure in ten minutes.

If what you actually need is the naming and identification layer — which fitting is called what, and how to read a size designation without guessing — that is a separate job, and our complete PPR fitting name reference with sizes and applications covers it properly. This article assumes you already know what the parts are called and starts at the question of how many.

The Measurement Rule That Decides Whether You Count Fittings At All

Before you count a single elbow, settle one question: on this project, are fittings a priced item or not? The answer is not a matter of preference, and on any tendered job it has already been decided by the measurement standard the BOQ was written to.

The RICS New Rules of Measurement 2 (October 2021 edition) governs this for mechanical services in Work section 38. Its rule for pipework is blunt: the unit is the metre, and “Generally, all pipework should be measured inclusive of all fittings, i.e. unions, connectors, flanges, bends, tees, junctions, reducers, test points, bosses, sockets, tappings, etc.” It then closes the gap in one line — “Unless measured separately, all fittings are included.”

On a compliant NRM2 bill, your elbow count may never appear as a priced line. It is still the only way to know what to buy.

NRM2 does allow the opposite treatment, and names the condition. Item 4 of the same section is “Alternative – pipe fittings”, enumerated in numbers and described by type, material, finish, nominal diameter and method of jointing. The preamble explains when that alternative applies: where the drawing information is available, fittings should be identified and measured separately; where it is not available, pipework is measured inclusive of fittings. It is a question of what the drawings can support, not of what the estimator prefers.

Valves are not fittings, in either convention

This is the distinction that trips up buyers who learned the vocabulary from a catalogue rather than a bill. In NRM2 terms, valves are not fittings at all. They are pipe ancillaries, item 5, enumerated in their own right, alongside strainers, expansion bellows, anchors, guides and rollers, tundishes, traps and pipe sleeves. So a ball valve is counted separately whichever way you treat the elbows — and the unions that let that valve be removed later are fittings, counted under a different rule. One valve position on a drawing routinely generates three purchase lines.

One more trap worth knowing before you copy a convention off an old job: above-ground drainage runs the rule in reverse. Work section 33 measures pipework “over all fittings” and then bills the fittings as “items extra over the pipe in which they occur”, with reducing fittings taken extra over the largest pipe they occur in. If your hot-and-cold takeoff and your waste takeoff sit in the same workbook, they are following opposite conventions by design.

Counting Fittings Off the Drawing, Not Off a Ratio

Now the count itself. Work the layout system by system and size by size — cold, hot, and each riser separately — marking the drawing as you go so nothing is traced twice. Every fitting you will ever buy is generated by one of four events on that drawing, and if you hunt for those four events specifically you will not miss the branch nobody noticed.

• Direction change: one elbow, at the angle drawn. A 45-degree offset around an obstruction is two fittings, not one.
• Branch: one tee. Note the branch size at the moment you mark it, not later.
• Size transition: one reducer, or a reducing socket, keyed as a size pair.
• Isolation or removable point: one valve, plus the unions that let it come out again without cutting the line.

Why we will not give you a fittings-per-point ratio

You will find pages offering one — so many elbows per fixture, so many tees per apartment. We are not going to add to them, and the reason is worth stating plainly: no authority publishes such a ratio, because it does not survive contact with a second building.

A hotel floor with a central riser and short lateral drops generates a fraction of the direction changes of the same floor area routed around a structural core. Any number filling that gap has been invented, and a contractor will catch it the first time he checks it against his own last job. Counting four events off a drawing takes an afternoon and is right; a ratio takes a minute and is confidently wrong.

The reducing-tee trap

The single most common ordering error in this range is a reducing tee written with the branch in the wrong position. A reducing tee needs three dimensions — run, run, branch — and a two-number shorthand scribbled at the drawing stage is ambiguous by the time it reaches purchasing. Write the branch size explicitly, every time, at the moment you mark the drawing. The same discipline applies to the brass-insert transitions where PP-R meets a metal riser: the count comes from the number of metal interfaces, and the thread designation has to travel with it. Our guide to connecting PPR to metal pipe covers which transition suits which interface.

The Pipe Length PPR Eats That Your Drawing Does Not Show

Here is where a PPR takeoff genuinely differs from a threaded or solvent-cemented one, and where most spreadsheets quietly under-order. Socket fusion works by pushing the pipe end into the fitting socket to a fixed depth. That depth is not a tolerance or a rule of thumb — it is a published dimension per size, and it is length that disappears from your run into the joint.

Aquatherm’s Fusiotherm installation instructions tabulate the welding depth for each diameter: 14.0 mm at OD 20, 15.0 mm at OD 25, 16.5 mm at OD 32, 18.0 mm at OD 40, 20.0 mm at OD 50, 24.0 mm at OD 63, 26.0 mm at OD 75, 29.0 mm at OD 90 and 32.5 mm at OD 110. Every joint has two ends, so each fitting removes twice its welding depth from the pipe you have to supply.

What that costs on a real run

Take a 25 mm branch measured at 46 m on the drawing, with 38 fused joints along it. At 15.0 mm per end and two ends per joint, the joints absorb 38 × 30.0 mm = 1.14 m. On its own that is a rounding error. The reason it matters is that it runs the same direction as every other correction — offcuts, penetrations, the last stub off each bar — and a takeoff that ignores all of them together is the one that comes up two bars short on the top floor.

The second conversion is bar length, and it is not a constant. Aquatechnik, for instance, publishes its Fusio-technik SDR 6 range as supplied “from diameter 20 mm to 110 mm in 4 meter bars”, while its fibre-composite FIBER-T range is “4 meter bars up to diameter 125” and “5,8 meter bars for larger diameters”, and its UV-resistant line ships in 5.8 m bars from 20 mm up. Bar length varies by diameter and by product line within one manufacturer, so metres never convert one-to-one into bars until you have your own supplier’s figure in hand. Ask for it before you price, not after.

Where the Waste Allowance Legitimately Belongs

Ask what waste percentage to use for PPR and you will get a number from almost anyone. The more useful answer is that on a properly measured bill, the question has already been answered for you — and adding a percentage anyway means paying for the same waste twice.

NRM2 Work section 38 opens with a list headed “Works and materials included”. The first item on it is “all waste”. The second is “extra material for labour-made fittings”, followed by all couplings, brackets, supports, fixings and cast-in channels. In other words, a compliant measured quantity is a net quantity, and the waste is deemed to sit inside the rate rather than inside the measurement. Inflate the measured length by ten percent and then apply a rate that already carries waste, and you have bought the allowance twice over.

Measured quantity and priced quantity are two different columns

This is the distinction to build your spreadsheet around, and it is one that commercial estimating guidance reaches independently of the standard: add the allowance for wastage and cutting at the rate build-up stage, not by inflating measured lengths, keeping the measured quantity and the priced quantity conceptually separate. The same guidance is emphatic that the BOQ preamble should state once, clearly, whether the piping rates are inclusive of fittings, supports, testing and concealment, or whether those are separate items. If you are handed a bill whose preamble says nothing on that point, that is the question to ask before you price anything.

For context on what commercial practice does apply where an allowance is genuinely being added: one widely-read US estimating guide advises “a 5–15% pipe contingency for cut waste, offsets, and floor penetrations” and “a 3–10% wastage allowance for site inefficiencies” on fittings, valves and accessories. Treat those as a report of what estimators do, not as a rule we are handing you — they are a single trade source with no issuing authority behind them, and they are material-agnostic.

Grouping the Count Into SKU Families You Can Reorder

A takeoff organised by drawing area dies the moment the project moves. A takeoff organised by SKU family is still useful two years later, on a different building, for a stock replenishment nobody planned. The structure is the same one procurement documents settle into on their own: pipe billed by length, fittings billed by number, and both grouped into one block per size.

Real tender schedules show the pattern plainly. A published Indian hospital plumbing tender lists its supply items as a repeating per-size family — union, ball valve, elbow, socket, tee and pipe at three-quarter inch, then the identical family again at one inch and one-and-a-half inch — with reducers written out as explicit size pairs rather than folded into one line. Follow that shape and every reorder becomes a quantity edit rather than a fresh takeoff.

• One family per size: socket, elbow (each angle), tee, union, cap, valve — each its own line at each OD you use.
• Reducers as size pairs: 32×25 and 25×20 are different SKUs and must never share a row.
• Fast core versus long tail: keep the handful of sizes that carry most of your volume separate from the specials you buy once a year.
• Transitions in their own block: brass-insert parts carry a thread designation as well as an OD, so they never sort correctly inside the fusion families.

The four questions to send your supplier before this becomes a purchase order

A counted list is not yet an order, because the supplier’s packaging decides the final number. These are the four figures to request — and we are naming them rather than printing our own, because pack and carton quantities vary by manufacturer and quoting someone else’s would be worse than useless.

• Pack and carton quantity per fitting size, so a count of 43 elbows resolves to a whole number of cartons.
• Straight length per pipe OD, which as shown above is not the same across diameters or product lines.
• Carton and pallet volume and weight, the moment the order is going into a container.
• Production and shipping lead time, stated separately, so a reorder point can be set against real days.

On the commercial terms you can pin down now: the Hitze PP-R fitting range covers OD 20–110 mm (DN15–DN90) across sockets, elbows, tees, reducers, unions, caps, clips, valves and brass-insert threaded fittings from 1/2 inch to 2 inch, all jointed by socket heat fusion. There is no minimum order quantity — samples or a small trial order are the normal entry point, which means a first order can mirror your real size mix instead of a pallet minimum.

On compliance, the PP-R range is made to DIN 8077/8078 and EN ISO 15874 with SKZ testing, DVGW type examination for drinking-water pipe, and WRAS and NSF/ANSI 61 credentials across applicable lines. Certificate references are available on request. For any tender, ask for the certificate covering the exact models you are listing and verify it in the issuing body’s public directory rather than taking a scope claim at face value.

Pricing on a list of this kind is quoted against the finished size mix rather than as a per-part rate — our PPR pipe price guide for importers sets out what actually drives the number.

Ask any supplier, ours included, what is checked before your counted sizes ship. The documented Hitze sequence is resin verified before extrusion; OD, wall thickness at multiple points and ovality checked against the S-series tables; then pipes, fittings and fused joint assemblies pressure-tested on in-house hydrostatic benches against the DIN and EN ISO thresholds. The middle step is the one a takeoff depends on — if wall thickness and ovality drift, the socket depths your joint count assumed stop holding.

Check your counted list against the actual range

For wholesalers and contractors pricing a counted PPR list: the catalogue page sets out the fitting families — sockets, elbows, tees, reducers, unions, valves, caps, clips and brass-insert threaded fittings — across OD 20–110 mm, and states the no-MOQ position, so you can confirm every line you have counted is a part we actually make before you ask for a price.

See the PPR fitting range

A Worked Takeoff You Can Copy

Here is the whole method run end to end on a small illustrative layout: a hotel riser serving two guest bathrooms per floor, cold water only, counted the way the four triggers say to count it. The quantities are an example built to demonstrate the arithmetic, not a record of a real project — but the structure is exactly what you should be handing a supplier.

Two things about that sheet are worth more than the numbers in it. The valve row and the union row are separate, at two unions per valve, because that is what makes a valve replaceable — and it is the line most often collapsed into one. And the final row says “ask” rather than carrying a figure, because the bar count genuinely cannot be closed until the supplier states the straight length. A takeoff that shows its open questions is more useful than one that fills them with plausible numbers.

If you are building a stock range rather than pricing a single job, the same family structure is the backbone of a distributor listing — how to build a PPR distributor range takes it from project counting to stocking decisions.

Conclusion

A PPR takeoff is three decisions, not one long count: which measurement convention the bill is written to, what the drawing actually generates at its direction changes and branches, and how much of your measured length the fusion joints and bar lengths take back before it becomes a purchase quantity. Get those in the right order and the elbow row stops being a guess.

Before you send your next list out for pricing, check that it separates valves from fittings, keys every reducer as a size pair, and leaves the bar count open until your supplier states the straight length. If you want to sanity-check the sizes and families on that list against a real range, the PPR pipe and fittings catalogue is the fastest place to do it.

Frequently Asked Questions