Plumbing Postcards for Maintenance
Reminders & Win-Back

PostKnock postcards start at $1.04 per card on the Free plan and $0.91 per card on Pro ($99/mo). That includes printing and USPS First-Class postage. No minimums, no contracts, no hidden fees.

The best-performing plumbing postcards include a maintenance inspection offer with a clear dollar amount, seasonal urgency ("Winterize your pipes before the freeze" or "Spring pipe check, catch leaks early"), your phone number in large type, and a QR code linking to an online booking page. Keep the message short: one offer, one call to action.

Time your postcards to land before seasonal demand. For winterization campaigns, send in October–November before the first freeze. For spring pipe checks, send in March–April. This catches customers before they start searching for help, so you book jobs before the emergency happens.

A winterization campaign sends postcards in October–November reminding homeowners to prepare their pipes for freezing temperatures. The postcard offers a winterization inspection, and your team follows up by phone a few days after delivery. It's a low-cost inspection that often leads to upsells (insulation, pipe replacement, water heater service).

They serve different purposes. Google Ads captures people actively searching ("plumber near me"), while postcards generate demand before the emergency: filling your schedule with planned maintenance instead of competing for emergency calls. Postcards to your existing customer list typically convert at 2–5% vs. 1–3% for cold digital leads, and the average ticket is higher because they trust you already. Smart plumbing businesses use both.

If your CRM tracks equipment installation dates or last service dates, export customers with water heaters 8+ years old. Upload that list to PostKnock and use the Water Heater Reminder playbook. The postcard asks whether their water heater is getting old and offers an inspection, creating urgency without being pushy.

30 minutes from signup to launch. Time-sensitive for plumbing: every week of delay before the first hard freeze costs you booked maintenance jobs that turn into emergency calls for competitors. Cards mail via USPS First-Class within 1–2 business days.

Yes. Pro is $99/mo (or $799/yr, save $389). Cancel anytime from Settings → Billing. After cancellation you keep Pro features until your billing period ends, then revert to the Free plan automatically. No contracts, no cancellation fees, no exit calls. Your first annual plan includes a 30-day money-back guarantee.

Yes: any field service management system with CSV export (ServiceTitan, Housecall Pro, FieldEdge, Workiz, etc.) works with PostKnock. Export your past customer list, upload, and the import wizard auto-maps the columns. Zapier is live too: if an app you use connects to Zapier, new customers can flow into PostKnock as contacts automatically, no repeat export. It just adds or matches the contact record; you still choose when to launch a campaign. PostKnock has no native connector for a specific dispatch or FSM tool, so export a CSV or Excel file and import it.