Manchester G12845 Remote Sending Unit – Screw-On

The Manchester G12845 is a remote sending unit that threads onto compatible Manchester mechanical dial gauges to transmit propane level to a remote dash/coach indicator. It’s a screw-on style sender designed for RVs, motorhomes, food trucks, and other ASME tank installations that need a reliable remote readout of LP level from inside the vehicle.

• Screw-on mount—attaches directly to Manchester gauge heads designed for remote senders.
• Electrical output: variable-resistance sender for remote fuel/LP level gauges (see ohm range note below).
• Sealed body for outdoor tank environments; simple two-wire hookup to indicator/gauge.
• Use case: read your LP level from inside the coach without opening the tank compartment.

What’s Included

• (1) Manchester G12845 remote sending unit (screw-on type)
• Basic wiring pigtail (two-wire) attached to sender

Specs

Manufacturer	Manchester Tank
Part Number	G12845
Mounting Style	Screw-on to compatible Manchester gauge head (remote-sender ready)
Electrical Output (Ohm Range)	Typically 240–33 Ω or 0–90 Ω depending on gauge/indicator; verify with your coach indicator and tank gauge head before purchase.
Wiring	2-wire sender (signal + ground) to compatible remote level gauge
Body/Seal	Weather-resistant, sealed housing for exterior tank service
Operating Use	For use with Manchester mechanical dial gauges that accept screw-on remote senders (ASME motorhome tanks / select DOT cylinders with sender-ready heads)
Approx. Dimensions	Compact sender body; height ~1–1.5", diameter ~1.5–2" (reference only—manufacturer does not publish exact dims for this PN)

Compatibility

• Fits Manchester gauge heads that are explicitly labeled as remote-sender capable and use the screw-on sender interface.
• Pairs with remote LP/fuel level indicators that match the sender’s resistance curve (ohm range). Examples: common RV panel meters, some Teleflex/Faria style fuel gauges, and OEM coach indicators.
• Not universal: will not fit snap-in/clip-on sender styles or non-Manchester gauge heads unless listed cross-compatible by the gauge manufacturer.

Installation Notes

1. Confirm your gauge head accepts screw-on senders and note the required ohm range for your remote indicator.
2. With propane service OFF and area ventilated, remove the gauge’s sender cap/blank and thread on the G12845 until snug. Do not overtighten.
3. Route the two-wire lead to the coach indicator. Connect signal to the gauge “S” or “Sender” terminal and ground to chassis/indicator ground.
4. Power up the indicator and verify sweep from Empty to Full as the tank level changes. If the reading is inverted or incorrect, the indicator/sender ohm curve likely doesn’t match—use the correct gauge or sender range.

Common Questions

What ohm range is the G12845?
Manchester sells sender heads in different resistance curves depending on the gauge system used in the coach. Many RV panels use 240–33 Ω (marine/automotive “American” standard) while some OEM panels use 0–90 Ω. Check your indicator’s spec and the gauge head marking before ordering.

Will this fit my tank?
If your Manchester gauge head is labeled for a screw-on remote sender, yes. If your gauge is a snap-in/clip-on style, you need that style sender instead.

Can I reuse my existing indicator?
Yes, if its ohm range matches the sender. Otherwise, replace the indicator or sender so the ranges match.

RVupgrades Support

Need help confirming gauge style or ohm range? Call, chat, email, or text RVupgrades—we’ll help you match the correct sender to your tank and panel before you buy.

Manchester G12845 screw-on remote sending unit for Manchester LP tank gauge heads. Two-wire variable-resistance output for compatible coach indicators. Verify ohm range (e.g., 240–33 Ω or 0–90 Ω) with your panel before ordering.