Postcards remind homeowners about maintenance before the emergency. Your team calls to book the job—before they search Google for someone else.
Start Free — No Credit CardPlumbing is emergency-driven. Customers don't think about maintenance until something breaks. A well-timed postcard + call converts because you're solving a problem they haven't thought about yet.
Three campaign types. All pre-configured with timing, scripts, and postcard copy direction.
Seasonal urgency. Pipe inspection special + winterization offer. Deploy Oct–Nov for winter prep; Mar–Apr for spring pipe checks.
"We're scheduling winterization appointments—want to lock in your spot before the freeze?" Second postcard only if no contact.
Equipment age framing. "Your water heater is 8+ years old—the average lifespan is 10 years. A $99 inspection now prevents a $2,000 flood later." Target homes with units 8+ years old.
"We serviced your water heater a few years back—these units typically need replacing around the 10-year mark. Want us to take a look?" Pre-loaded script with equipment history.
Service gap framing. "It's been a while since we serviced your home—small leaks become big problems." Priority inspection offer.
"We noticed it's been a while since we serviced your home. Want to schedule a quick inspection before the season changes?" Pre-loaded script with service history notes.
Different design with cost-of-emergency framing. "A burst pipe averages $5,000 in water damage—a whole-home inspection is $99." Final call attempt for non-responders.
"Last chance before winter" urgency. Limited-time discount on whole-home plumbing inspection. Non-responders rest 90 days, then recycle next season.
Plumbing is emergency-driven—be the one they remember before it breaks. Lists recycle seasonally.
Four design styles, all themed for your plumbing business and ready to customize. Same offer, same call follow-up — just pick the look that fits your brand.
Bold
Photo
Minimal
Gradient
Front Detail
Back (Address Side)
Choose "Seasonal Maintenance," "Water Heater Reminder," or "Win-Back Campaign." Timing, scripts, and postcard direction are pre-configured.
Export past service customers from your CRM as CSV. Include last service date, equipment age, and service type for targeted messaging.
Postcards mail via USPS. Your call queue populates a few days after delivery. Time it right and customers book before the emergency happens.
Pre-loaded scripts. Log outcomes. Warm leads get priority. The sequence runs itself, Mon–Sat.
A plumbing company with 1,000 past customers sends seasonal maintenance postcards:
That's $15,000 in revenue on a $790 spend — a 19:1 return.
Free to explore — you only pay when you're ready to send. 30-day money-back guarantee.
Single-wave postcard campaigns · Unlimited contacts · From $1.05/piece
Everything in Free + calls, sequencing · From $0.79/piece
Per-piece pricing includes printing + USPS First-Class postage. No hidden fees.
PostKnock also works for
Specific plumbing campaigns
PostKnock postcards start at $1.05 per card on the Free plan and $0.79 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 mentions their unit's age and the average lifespan (10–12 years), creating urgency without being pushy.
30 minutes from signup to first card mailed. 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. Annual plans include 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 to PostKnock, and the import wizard auto-maps the columns. Direct API integrations are not yet available.
Stop sending postcards and hoping. Start sending postcards and calling.
Start Free — No Credit CardContact Sales
Tell us about your needs and we'll put together a custom plan.
1 ANA (Association of National Advertisers), Response Rate Report 2023, published February 2024. 4.4% average response rate for direct mail to house lists.
2 IBISWorld, “Plumbers in the US — Number of Businesses,” 2024.
3 HomeAdvisor, “Average Cost of Emergency Plumbing,” 2024.