Archived report · 2 min read · Set in The Callum Valley ·
Report on the Pump House Gauges, Callum Valley
A survey of the water-pump gauges in Callum Valley finds pressure readings that rise and fall in step with the breath of the village sleepers, and a valve that will only close when the parish clock has struck the hour.
- filed: Filed with the spring water return
- reference: WP/CV/19
Subject: pressure gauges, Callum Valley pumping station, serving the upper villages.
1. The station was built in 1910 and houses two steam-era pumps, since replaced by electric units. The gauges are original brass instruments, each calibrated to a range of zero to one hundred pounds per square inch. The system was last inspected in 2016.
2. Routine readings were taken over a seven-day period at fifteen-minute intervals. The readings were within normal range throughout, with variations consistent with the pumps' duty cycle.
3. An anomaly was observed in the readings from the number two gauge. The needle moved in a slow, regular swing, between 46 and 52 pounds, with a period of approximately eleven minutes. The movement was not reflected in the flow meter, the pump motor or the downstream sensors.
4. The swing was found to correspond to the average breathing rate of the sleeping population of the three upper villages, as estimated from the regional census and the records of the village clinic. Rates were highest in the early hours, when most residents are asleep.
5. The number one gauge did not show the swing.
6. Inspection of the main shut-off valve found it fully open. An attempt to close it at 03:30 failed. The valve closed without difficulty at 03:00, precisely as the parish church clock struck the hour, and reopened at 03:01.
7. Recommendation: replace the number two gauge and the shut-off valve. The engineer assigned to the work was advised to attend the station in daylight.
8. Observation not explained by the survey: the engineer, on the second visit, found the number two gauge already replaced, with a new brass instrument fitted, and the old one set neatly on the platform beside the pump. The needle on the old gauge was still swinging.
9. The original brass instrument has since been recalibrated and returned to service at the upper station, where it reads correctly and does not swing.
10. The engineer's report was reviewed by the regional office, which accepted it without comment.