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Garden and growing · GG-13

Rainwater Harvesting and Butt Log

A water butt record — every butt and tank listed with what feeds it and what it holds, then a log of levels, rainfall, what the water was used for and cleaning.

First page of the Rainwater Harvesting and Butt Log — Know how long a full butt really lasts in a dry spell and which one always runs dry first, so the next butt goes where it will actually fill.
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2 pages. Choose your paper size — both versions are laid out identically, so neither one gets shrunk to fit.

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The fillable versions have real form fields — open them in any PDF reader, type into them and save. Printing help.

What this sheet is for

Know how long a full butt really lasts in a dry spell and which one always runs dry first, so the next butt goes where it will actually fill.

Who it is for

Gardeners and allotment holders collecting rainwater, and anyone with a greenhouse or polytunnel roof worth harvesting.

How to use it

  1. Number each butt on its lid and list it: where it is, what feeds it, what the maker's label says it holds.
  2. Log the level whenever you draw water, with rainfall since the last entry from your own gauge.
  3. Tick off cleaning and checks — lid, mesh, tap, overflow, sludge — as they happen.
  4. Note what was done for frost, so a split tap is not a surprise in spring.

What is on the sheet

2 pages, in this order:

Page 1

Printed under the title: Every water butt, tank and diverter on the plot — where it fills from, what it holds, and a running log of levels, use and cleaning through the year.

Your roof, your gauge. How much a butt collects depends on the roof feeding it and the rain where you are, so no figures are printed. Write the capacity from the maker's label and the rainfall from your own gauge, and the log will show you how long a full butt really lasts in a dry spell.

Write-on lines: Garden, plot or site · Year · Rain gauge kept at

Butts and tanks — one row each — number them on the lids

Table, 4 rows: No. · Where · Fed from · Holds · Diverter / filter · Overflow goes to · Lid & mesh

Where the water comes from — sketch roofs, downpipes, diverters and butts by number

Squared grid

Page 2

Level, use and cleaning log — one row per visit to a butt

Table, 21 rows: Date · No. · Level · Rain since last · Used for · Cleaned / checked · Frost care · Notes

Questions

Why no figures for how much a roof collects?

Because that depends on the roof area, the rain where you are and how good the diverter is, and a printed estimate would be wrong for almost everyone. Your own gauge and your own log give a real answer within a season.

Does this cover mains watering as well?

No. What was watered, when and by what method belongs on the Watering and Irrigation Schedule. This sheet is about the stored water itself — where it comes from, how much is in hand and whether the butts are clean.

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