Simpson MB1518 Pressure Washer Parts & Accessories

Genuine Simpson® OEM parts, compatible replacements, and accessories for the Simpson MB1518 Mini Brute 1500 PSI at 1.8 GPM with Triplex Pump Hot Water Professional Electric Pressure Washer. Everything on this page is confirmed to fit the Simpson MB1518.

The machine

Need to replace the whole unit? Shop the Simpson MB1518 pressure washer here →

Owner’s manual & parts diagram

• 📘 Owner’s manual (PDF): Download →
• 📘 Owner’s manual (PDF): Download →
• 📘 Owner’s manual (PDF): Download →
• 📄 Full parts diagram (PDF): Download the full exploded diagram →

The three parts that fail first (most-requested)

1. Replacement pump — the most common wear item after 300-500 hours or freeze damage. Check the parts diagram for the exact model.
2. Replacement pressure hose — 3/8" wire-braid hose. Shop Simpson pressure washer hoses →
3. Replacement wand / lance — cracked, bent, or corroded wands are the #1 field-replaceable item after nozzles.

Genuine Simpson OEM parts we stock for the MB1518

• 7108134 — GUN,5075PSI 12GPM 3/8 FNPT IN 1/4 FNPT
• 7102207 — KIT, SVC ASSY SOAP HOSE W/PLASTIC FILTER
• 7110265 — WATER OUTLET KIT
• 7110329 — WATER INLET KIT
• 7101359 — THERMAL RELIEF VALVE, 1/4" NPT

Compatible replacement categories

For hoses, wands, guns, and pumps we also stock third-party replacements that fit the MB1518:

• Simpson-compatible pressure washer hoses
• Pressure washer guns, wands & extensions
• Pressure washer quick-connect nozzles & couplers
• Triplex plunger replacement pumps
• Full pressure washer pump catalog

Don’t see the part you need? Call us at 412-744-4004 — we can order most Simpson OEM parts direct from the factory.

Pittsburgh Spray Equipment has been the region’s pressure washer service specialist since 1947. Questions on your MB1518 or need help identifying the right part? Call 412-744-4004.