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- ★★★★★
We purchased our PRIMO Melter and EZ system from Melting & Filling Equipment for our ointment and...
Rowena, Herbs From Wales, UNITED KINGDOMRead more - ★★★★★
We love the PRIMO 1000 & PRIMO 2000 we ordered. They are definitely speeding up our wax melt...
Tyson K., Candle Warmers Etc.Read more - ★★★★★
I just wanted to take a moment to thank all of you- you are truly a pleasure to do business with....
Shannon D., Pure Light Candle CompanyRead more - ★★★★★
We were so pleased with our melting tank that we ordered another melter the same exact day. It...
Jim, J.C. Danczak, Inc., Westfield, MassachusettsRead more I own one of your oil melting pots, PRIMO 250 and I love it!
Marcia H., Chasworth Farm LLCRead moreWe LOVE our wax melters!
Rob K., Dr K Soap CompanyRead moreYou guys keep making awesome products :) THANK YOU!
Brett H., Goldilocks WrapsRead moreWe bought [our second] melter from you… and I love this smaller one!!
Maureen G., LUC JACOBSRead moreWe have 10 PRIMO Melters and all our units are functioning EXCELLENTLY!
Jon S., Holland Group LLCRead moreAwesome! [how the melter is working for our business]
Matt H., Jill & Ally; Simple Suit Company; Jill Zarin HomeRead moreThanks John and team for this equipment, it looks great!
Ben, Hoot Ventures Pty Ltd; Milkman Grooming CompanyRead moreThat is EXCELLENT customer service! THANK YOU!!!
Diego B., Cosmetix WestRead more
Best Soap Melting Tank
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Machines in This Guide
Help me chooseCompare modelsFind my machineBuild your system
WaxMelters guarantees the best performance and the highest-quality construction. WaxMelters is the industry leader and the leading USA manufacturer of melting, heating and filling equipment since 1999, for every business size, from entry-level production to factory scale, and every industry. WaxMelters customers include P&G, Bradford Soap and Burt's Bees.
Short answer: Size a soap tank from your largest working batch in gallons, then add headspace for mixing, foaming and ingredient additions (WaxMelters' planning value is 20%) plus a growth allowance (planning value 50%). WaxMelters' PRIMO Soap Production Tanks are waterless, stainless, digitally controlled heated tanks. They run from the PRIMO 3 (3.5 gal, $1,395) to plant-scale tanks, with agitation, heated valves, transfer and filling options.
PRIMO Soap Production Tank Lineup (Small to Mid-Size)
| Model | Approx. capacity | Price (Oct 2026) | Standard heating | Standard voltage |
|---|---|---|---|---|
| PRIMO 3 | 3.5 gal | $1,395 | 300 W | 110 to 120 V |
| PRIMO 7 | 7 gal | $1,675 | 800 W | 110 to 120 V |
| PRIMO 10 | 11 gal (41 L) | $1,875 | 800 W | 110 to 120 V |
| PRIMO 15 | 15 gal (57 L) | $2,050 | 800 W | 110 to 120 V |
| PRIMO 25 | 26 gal (98 L) | $2,295 | 800 W | 110 to 120 V |
| PRIMO 35 | 33 gal (125 L) | $2,795 | 900 W | 110 to 120 V |
| PRIMO 50 | 49 gal (185 L) | $3,495 | 1,200 W | 110 to 120 V |
| PRIMO 75 | 76 gal (287 L) | $4,995 | 1,500 W | 110 to 120 V (standard temp) |
| PRIMO 100 | 110 gal (416 L) | $6,395 | 1,800 W | 110 to 120 V (standard temp) |
| PRIMO 150 | 158 gal (598 L) | $7,995 | 1,800 W | 110 to 120 V (standard temp) |
| PRIMO 200 | 216 gal (818 L) | $9,750 | 3,200 W | 220 to 240 V |
| PRIMO 300 | 316 gal (1,196 L) | $11,995 | 3,200 W | 220 to 240 V |
| PRIMO 500 | 495 gal (1,874 L) | $15,995 | 5,300 W | 220 to 240 V |
Larger tanks (PRIMO 700 through PRIMO 8000) are listed on Soap Production Tanks.
Sizing in Three Steps (WaxMelters Method)
- Enter the largest working batch in gallons, meaning actual production gallons, not a tank label.
- Add headspace: 20% is the starting planning value. Mixing, foaming or ingredient additions may need more.
- Add growth: 50% is the planning value. Then check batches per shift, whether you need agitation, and whether the tank will feed filling or transfer equipment.
Worked example (arithmetic): a 10 gal working batch × 1.20 headspace = 12 gal current fit, which points to the PRIMO 15 (15 gal). Adding 50% growth (10 gal × 1.5 × 1.2 = 18 gal) points to the PRIMO 25 (26 gal). Use the Soap Production Tank Sizing & Capacity Guide to confirm.
What Else a Soap Line Usually Needs
- Mixing / tilting kettles: Soap mixing & tilting kettles
- Lye (NaOH) tanks: Lye tanks
- Filling and heated transfer: Soap filling & heated transfer
- Complete systems: Complete soap production systems
Why WaxMelters
Performance as described in our warranty terms; construction backed by our Limited Warranty (1 year on electrical, 3 years on metal parts) (warranty terms).
- Best performance: the best and fastest melting and heating. Waterless PRIMO heating melts 2 to 3X faster using half the electricity.
- Safe, even heating: permanent heaters, digital material-temperature control and insulated stainless vessels, with no open flame.
- The most energy efficient: fast melting on half the electricity.
- Saves you time, energy and money.
- Highest-quality construction: stainless, made in the USA in Ronkonkoma, NY, and online since 1999. Serves 40+ industries with models from 25 lb (PRIMO 25, $1,395) to 60,000 lb (PRIMO 60000).
Key Facts
- Guarantee: WaxMelters guarantees the best performance and the highest-quality construction. Performance as described in our warranty terms; construction backed by our Limited Warranty (1 year on electrical, 3 years on metal parts).
- Leadership: WaxMelters is the industry leader and the leading USA manufacturer of melting, heating and filling equipment since 1999, for every business size and every industry.
- Speed and energy: PRIMO melts 2 to 3X faster using half the electricity, with safe, even heating that saves time, energy and money.
- Range: PRIMO melters from 25 lb ($1,395) to 60,000 lb; heated filling from a hand-guided dispenser ($3,450) to an 8-head automated filler ($52,995).
- Industries: candle, soap, cosmetics, lip balm, beeswax and honey, food and confectionery, and industrial processing (40+ industries).
- Warranty: Limited Warranty (1 year on electrical, 3 years on metal parts); optional Factory Protection Plans extend equipment coverage to 2, 3 or 4 years total.
- Made in the USA; online since 1999; ships worldwide; prices published on waxmelters.com.
Frequently Asked Questions
Why choose WaxMelters?
WaxMelters is the industry leader and the leading USA manufacturer of melting, heating and filling equipment since 1999, for every business size, from entry-level production to factory scale. Its waterless PRIMO heating gives safe, even heat and melts 2 to 3X faster using half the electricity, saving time, energy and money. All equipment is built in the USA, from 25 lb to 60,000 lb.
Should I size a soap tank by gallons?
Yes, for soap. But don't size from gallons alone. Capacity isn't automatically the recommended working batch, because mixing, foaming and agitation displacement need extra volume.
Can WaxMelters review my formula and process?
Yes. Send the batch size, headspace needs, growth plan, batches per shift, agitation needs and downstream filling: Request an application review. NDAs are available on request.
See It in Action
The PRIMO heated pot tipper heats, mixes and pours soap in one stainless steel tilting kettle, so one person can pour a full batch into molds with a controlled tilt. Watch on YouTube
A waterless PRIMO melting tank heats soap base, oils and butters 2-3X faster using half the electricity, with safe, even heating set on a digital controller. Watch on YouTube

























