One enquiry, four desks: where a homeowner’s wastewater enquiry waits

A homeowner with a failing septic tank sends one enquiry and waits for a price. Behind that enquiry, up to four desks may handle it: an installer, a manufacturer or supplier, a builders’ merchant, and the handoffs between them. Each desk judges itself on its own part. The homeowner only sees the wait.

This article draws on a small mystery-shop study of UK off-mains wastewater firms, run in October and November 2026. Firms are anonymised, the sample is small and the figures are a dated snapshot. It is not a ranking of any firm. The homeowner in the story, Amanda, is fictional.

The question that changes the picture

Most discussion asks which firm replies fastest. A more useful question is where one enquiry waits between the homeowner and a price. Asked that way, nobody is slow on purpose. Each desk works reasonably well on its own. The delay sits in the gaps between them.

Desk 1: the installer

Amanda has a four-bedroom house and a failed septic tank. She rings installers. Of 46 firms with a valid record, shoppers reached a person at least once at 23. Of those 23:

• 1 gave a firm price and 5 gave a ballpark. 17 gave no price.
• At least 14 needed details before they could say more.
• At least 12 wanted a site visit first.
• 10 promised a callback.

Asking for details is reasonable. The question is whether the same questions are asked again at the next desk.

Desk 2: the supplier

Amanda, or the installer on her behalf, goes to a manufacturer. In the daytime phone round, 13 of 15 valid numbers were answered by a person. Out of hours, 10 of 11 calls reached a recording. Web form replies took anywhere from 8 minutes to about 90 hours. Three replies so far gave prices, from £1,682 to £15,768. Two were supply-only and one did not say what the price covers, so none tells Amanda what the finished job will cost. The supplier then passes her to an installer by hand.

Desk 3: the merchant

A builders’ merchant can supply the tank. In the 5 November round, no merchant gave a price. Each asked for details by email. One replied after about 92 hours, with six questions.

The handoffs

Between desks, the enquiry travels by forwarded email. In the study, one forward arrived 12 minutes after the form and another 11 hours after. One installer introduction took 1 hour 44 minutes. At one firm, two salespeople contacted the same enquirer on the same day, each unaware of the other. These are single cases, not typical results.

What Amanda sees

She sent one enquiry. She now has replies from several desks. Most ask her questions she has already answered, and only a few contain a price. Nobody has seen the whole journey, and nobody owns the gap between the desks.

What a joined-up journey looks like

• A reply within minutes, at any hour, that confirms the enquiry and says what happens next.
• Qualifying questions asked once and carried to every desk.
• A clear statement of what a price covers: supply-only or installed, and what could change it.
• Handoffs that arrive with the details attached, not as a forwarded email.
• A named owner for the gap between desks.

For a closer look at the nine gaps behind this pattern, see Nine gaps between a homeowner’s enquiry and a price.

Study notes: UK firms, October to November 2026. Small sample. Firms anonymised. Reply times are elapsed hours from the first submission. Not a ranking of any firm.