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Pentair Pilot Screw w/ Captive Gum Washer | 79104800Z

Pentair SKU: 79104800Z

Pentair Pilot Screw w/ Captive Gum Washer | 79104800Z

Pentair SKU: 79104800Z
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Pentair 79104800Z Pilot Screw with Captive Gum Washer

The Pentair 79104800Z is a replacement pilot screw made of brass and supplied with a captive gum washer. It is used to secure the face plate of certain Pentair pool and spa light fixtures and ensures a watertight seal at the light housing.

Key Features

  • Brass pilot screw designed for durability in underwater lighting fixtures.
  • Includes captive gum washer to maintain seal integrity and resist corrosion.
  • Direct replacement part for compatible Pentair underwater pool and spa lights.

Technical Specifications

  • Part Number: 79104800Z
  • Includes: One brass screw and one gum washer
  • Application: Underwater lighting fixtures where face plate screws need replacement to maintain proper sealing.
  • Material: Brass screw, elastomer (gum) washer

Installation & Compatibility Notes

Before installation, switch off power to the light circuit and ensure water is drained or the light is dry. Remove the existing screw from the light face-plate, discard old washer, and insert the new 79104800Z screw with the captive gum washer properly seated between the screw head and face plate. Tighten to manufacturer torque spec (do not overtighten). Restore power and inspect for proper light operation and watertight integrity.

Maintenance Tips

  • Touch the screw and washer during annual light inspections; replace if the washer appears flattened, cracked or chemically damaged.
  • If you notice leaks around the light housing or the face plate seems loose or oxidised, replacing this screw with a fresh washer may correct the issue without full housing replacement.
  • Stock this small but critical part in your service kit to improve service call turnaround and reduce lighting downtime.

Why Choose This Part?

For pool service professionals, lighting contractors and supply-store inventories, the Pentair 79104800Z offers a simple, well-matched OEM replacement for securing underwater light face plates and maintaining water-tight seals. Replacing the screw and washer as part of routine lighting service helps protect against leaks, corrosion and fixture failures.

Questions about returns? View our return policy.

Hours Of Operation:

Monday - Friday: 7:00 am to 5:00 pm Phoenix Time

Saturday: 8:00 am to 2:00 pm

Sunday: Closed

  • We do not ship on Saturday or Sunday.
  • Orders totaling more than $300 will require signature confirmation upon delivery.
  • We process and prepare orders for shipment within 1 business day. Please note that many other pool supply retailers require 3–5 days of handling time before shipping.
  • Orders placed after 1:00 pm Phoenix Time may not be eligible for same-day shipment.
  • Expedited shipping options are available at checkout.

Return Policy:

  • Products that are received damaged will receive a refund in store credit.
  • Most products are eligible for return within 30 days of receipt, except where noted below.
  • To initiate a return, please complete an RMA form prior to sending your item back.
  • Original shipping costs are non-refundable and will be deducted from the return credit.
  • Items returned missing accessories or original packaging, or that are not in the same condition as received, may be subject to a restocking fee of up to 100% depending on the condition of the item upon return.
  • Some returns will be charged an automatic 15% restocking fee.
  • We are unable to issue refunds for items that have been damaged or rendered inoperable due to installer error.
  • Please complete the return form to receive your RMA number and return shipping label.
  • Chemical products are not eligible for return under any circumstances.
  • The Pentair Colorsync 618031 is not eligible for return.
  • Pool cleaners are not eligible for return.
  • Opened seals and o-rings are not eligible for return.
  • Capacitors are not eligible for return.
  • Plastic popup tools are not eligible for return.
  • Automation components and circuit boards are not eligible for return.
  • If a light is returned due to a reported malfunction and is found to be fully operational upon testing, return shipping costs and a restocking fee will be deducted from the refund.
  • Orders refused at the time of delivery will be subject to the original shipping costs being deducted from the refund.
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