Section 32 · Install & Run
Programme & O&M design
Ram schemes rarely fail because the machine breaks. They fail because an installer left, the community assumed someone else was responsible, and a rubber that costs less than a meal went unchanged for three years. This page is about designing the part that keeps the water flowing — the institution around the pump.
On this page
Designing the scheme, not just the pump
Technical design is the easy half and it is documented elsewhere on this site. The programme design is the half that decides whether the scheme is still running in five years, and it follows its own sequence.
| Order | What you settle | Where it is documented |
|---|---|---|
| 1 · Demand | Who is served, at what service level, growing how — and the peak rate as well as the daily total | Storage & distribution, Applications |
| 2 · Source | The low-flow month, not the wet one; flow measured properly and dated | Source assessment |
| 3 · Rights | Abstraction, environmental flow, landowner consent, who else uses the water | Permits & environment |
| 4 · Engineering | Fall, lift, drive pipe, vessel, delivery main, storage | Design & sizing |
| 5 · Build & commission | Hardware, installation, the first measured delivery figure | Build, commissioning |
| 6 · Handover | Ownership, spares, training, records — the four deliverables below | This page, and the as-built record |
Four deliverables a scheme should leave behind
None of these costs much, and each one removes a specific way the scheme dies. If a project has budget for pipework, it has budget for these.
📄 The as-built record
Fall, lift, drive pipe bore and length, valve settings, beat rate, chamber charge, and the commissioning delivery figure. Without it the machine cannot be re-tuned by anyone who did not build it.
📔 A live log
A weekly entry that turns "it feels weaker" into a trend with a date on it — and into evidence for a funder, a committee or an inspector.
🧰 A spares kit
Ordered at commissioning, stored with the pump, and known to the caretakers. Valve rubbers, a spare check valve, sealant, gaskets, caps.
👤 Two trained people
Not one. One will leave, or be unavailable in the month the ram needs re-tuning. Both should be able to re-tune the beat and renew a valve rubber.
Phasing, margin and contingency
- Build one before you build ten. The first installation is where you learn the site's real low flow, the real tuning, and the real cost. Replicate after that — the "build the first one, buy the second" instinct (buy or build) is really a phasing strategy.
- Design on the dry season and budget for growth. A scheme sized on the wet season breaches its own design every summer; one sized with no margin at all is full the day it is commissioned and short by year three.
- Expect the distribution to dominate the cost. The pump is the cheapest line in the budget; mains, tap stands, tanks and labour are not (where the money goes).
- Carry a contingency, and name the person who holds it. An unallocated ten per cent is what lets a scheme fix a scoured foundation without waiting for the next funding round.
Ownership, tariffs & the fund
The single most influential decision in the whole scheme's twenty-year cost is also the cheapest to make: decide, in writing, who owns the water supply, who maintains it, and who pays for it.
- Name an owner. A committee, a water user association, a municipal utility or one identified caretaker — with a one-page description of what they do and when. Ambiguity is the failure mode; a scheme whose maintenance is "everyone's responsibility" has none.
- Fund maintenance before you need it. A small monthly household contribution or a levy on the water, held in a ring-fenced account and accounted for openly. Money collected after a breakdown arrives too late and too grudgingly, and the collection itself is a fight you only want to have once.
- Keep the fund modest and visible. It only has to cover rubbers, gaskets, a few days of labour and the odd bag of cement — a small sum, and the whole difference between a scheme that lasts and a scheme that is remembered as a failure. Publish what goes in and what goes out; a fund nobody can audit stops being paid.
- Decide who is included. Water committees and tariffs are a well-documented place where the people who actually fetch and use the water — often women, often tenants rather than owners — are left out of the decision, and then out of the supply. Name them in the membership, not just in the consultation.
- Resolve the water rights in the agreement too. Who may take, in what season, and what happens when the stream drops below the licence condition is a governance question as much as a legal one (water rights).
- Write it on one page. A simple operating agreement — owner, caretaker, tasks, tariff, how disputes are settled, where the records live — beats a policy document nobody reads. Sign it at handover, alongside the as-built record.
A well-built ram is lost most often to a handover without an owner, a fund, a spares kit or a trained caretaker — and then quietly abandoned eighteen months later when something trivial goes wrong. The technology is robust; the arrangements are what need designing, and they cost a fraction of the pipework.
Spares, local manufacture & training
Make the machine repairable
- Standardise. Use the same valve type and size across every unit in a programme, so one box of spares covers all of them and a caretaker who has learned one has learned them all.
- Buy spares at commissioning, not when they are needed. Confirm the supply channel still exists before you buy the pump; if valve rubbers cannot be sourced, the ram is a disposable machine. See what to check before ordering.
- Know what wears. Facings, gaskets and snifter orifices are the consumables; the body, chamber and pipe should outlive the caretaker (lifespan).
- Count the shoebox. A small kit stored with the ram — spare facings, a check valve, sealant, a cap or two, and the wrench that fits everything on site — is what keeps a scheme running between visits.
Local manufacture is a strategy, not a saving
The programmes that have lasted are the ones where the rams, the spares and the skills are held locally, so the scheme does not depend on anyone flying in. The Philippine village programmes are the best-documented example on this site: locally fabricated machines, technicians trained in the hillside villages they serve, and a supply of parts that never has to cross a customs post. That is worth more over twenty years than a cheaper pump bought abroad (the AIDFI case study).
Training that sticks
- Train at commissioning, on the actual machine, not in a workshop with a different one. The skills are: start it from rest, re-tune the beat, renew a valve rubber, recharge the chamber, and clean the intake.
- Train two people, and train them to teach. The point is not two trained individuals but a local practice that outlives both.
- Leave the sheet, not just the lesson. A laminated copy of the cheat sheet, the as-built record and the weekly log on the pump-house wall does more than a verbal briefing (cheat sheet).
- Make the log part of the training. If the caretaker keeps the record from day one, the scheme has a memory — and a funder has a report (the log).
Sustainability check — before you call a scheme finished
Spend the money up front on the survey, the drive pipe, the tank, the training and the spares; spend almost nothing thereafter on energy; and hold a small, visible maintenance fund from the day it is commissioned. Name an owner, train two people, write down what you built, and keep a log. That combination is the entire reason a ram scheme can still be delivering water a generation after it was installed.
The economics behind all of this are on Costs & operation, and what to write down is on Monitoring, records & handover.