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Connector

Part number (MPN)
3003891

OEM Replacement Part & Compatibility Table

Brand
Guide price (£)
Not available: check the current price with the seller
Source
retailer parts list
checked 2026-11-06
Fitting notes

Work on gas appliances must be carried out by a Gas Safe registered engineer. Check the model and serial number on the boiler data plate. Source: a parts retailer's list, not the manufacturer's: confirm the part number on the data plate or with the manufacturer before ordering.

Compatible appliances

  • PRESS30 N/EC TC3/230-400/50 OL
  • PRESS30 N/EC TL3/230-400/50 OL
  • RS 250/M MZ 866 T OIL
  • RS 250/M MZ TC3/220-380/60 OL
  • RS 50/M MZ 826 T1 OIL
  • RS 50/M MZ TL3/220-380/60 OIL
  • RS 50/M MZ TL3/230-400/50 OIL
  • RS250/EV MZ TC3/400/50 OIL
  • RS250/EV MZ TL3/400/50 OIL
  • PRESS100N/EC TC3/230400/50 OIL
  • PRESS60 N/ECO TYPE 628 TC BURN
  • PRESS60 N/ECO TYPE 628 TL BURN
  • RLS 120/M MX TYPE 780 T BURNER
  • RLS 160/M MX TYPE 781 T BURNER
  • RLS 190/M MZ TC3/230/50 BURN
  • RLS 28 TC1/220/60 BURN
  • RLS 28 TC1/230/60 BURN NG&OIL
  • RLS 28 TL1/230/60 NG&OIL
  • RLS 38 TL1/230/50 NG&OIL
  • RLS 68/M MX 779 T NG&OIL
  • RLS50 TL3/230-400/50 NG&OIL
  • RS 130/E TC3/230-400/50 NG
  • RS 150/M TC3/400/50 BURNER NG
  • RS 190/M TC3/230/50 BURNER NG
  • RS 190/M TC3/400/50 BURNER NG
  • RS 250/E MZ 866 T1 BURNER NG
  • RS 250/E MZ TC3/230/50 BURN NG
  • RS 250/E MZ TC3/400/50 NG
  • RS 250/E MZ TL3/230/50 BURN NG
  • RS 250/E MZ TL3/400/50 BURN NG
  • RS 250/E TC3/380/60 BURNER NG
  • RS 64/E MZ 896 T BURNER OIL
  • RS 64/E MZ TL3/230-400/50 OIL
  • RS 70/E TC3/230-400/50 OIL
  • RS 70/M TL3/230-400/50 BURNOIL
  • Riello Rs100 822T1 3785216
  • Riello Rs100 822T1 3785218
  • Riello Rs103 822M 3785205
  • Riello Rs130 823T1 3785418
  • Riello Rs28/1 818M 3782035
  • Riello Rs28/1 818T1 3782016
  • Riello Rs28 3783208
  • Riello Rs38 810M 3784305
  • Riello Rs38 810M 3784306
  • Riello Rs38 810T1 3784315
  • Riello Rs70 821T1 3785018

Always check the model and serial number on the data plate before ordering.

Frequently asked questions

Which appliances does 3003891 fit?

The sources we checked list 3003891 (Connector, Riello) for: PRESS30 N/EC TC3/230-400/50 OL, PRESS30 N/EC TL3/230-400/50 OL, RS 250/M MZ 866 T OIL, RS 250/M MZ TC3/220-380/60 OL, RS 50/M MZ 826 T1 OIL, RS 50/M MZ TL3/220-380/60 OIL, RS 50/M MZ TL3/230-400/50 OIL, RS250/EV MZ TC3/400/50 OIL, RS250/EV MZ TL3/400/50 OIL, PRESS100N/EC TC3/230400/50 OIL, PRESS60 N/ECO TYPE 628 TC BURN, PRESS60 N/ECO TYPE 628 TL BURN, RLS 120/M MX TYPE 780 T BURNER, RLS 160/M MX TYPE 781 T BURNER, RLS 190/M MZ TC3/230/50 BURN, RLS 28 TC1/220/60 BURN, RLS 28 TC1/230/60 BURN NG&OIL, RLS 28 TL1/230/60 NG&OIL, RLS 38 TL1/230/50 NG&OIL, RLS 68/M MX 779 T NG&OIL, RLS50 TL3/230-400/50 NG&OIL, RS 130/E TC3/230-400/50 NG, RS 150/M TC3/400/50 BURNER NG, RS 190/M TC3/230/50 BURNER NG, RS 190/M TC3/400/50 BURNER NG, RS 250/E MZ 866 T1 BURNER NG, RS 250/E MZ TC3/230/50 BURN NG, RS 250/E MZ TC3/400/50 NG, RS 250/E MZ TL3/230/50 BURN NG, RS 250/E MZ TL3/400/50 BURN NG, RS 250/E TC3/380/60 BURNER NG, RS 64/E MZ 896 T BURNER OIL, RS 64/E MZ TL3/230-400/50 OIL, RS 70/E TC3/230-400/50 OIL, RS 70/M TL3/230-400/50 BURNOIL, Riello Rs100 822T1 3785216, Riello Rs100 822T1 3785218, Riello Rs103 822M 3785205, Riello Rs130 823T1 3785418, Riello Rs28/1 818M 3782035, Riello Rs28/1 818T1 3782016, Riello Rs28 3783208, Riello Rs38 810M 3784305, Riello Rs38 810M 3784306, Riello Rs38 810T1 3784315, Riello Rs70 821T1 3785018. Always check the model and serial number on the data plate before ordering.

Does 3003891 have equivalent or superseded part numbers?

The sources we checked list no equivalents for 3003891. Ask a Riello stockist to confirm.

What should I check before fitting 3003891?

Work on gas appliances must be carried out by a Gas Safe registered engineer. Check the model and serial number on the boiler data plate. Source: a parts retailer's list, not the manufacturer's: confirm the part number on the data plate or with the manufacturer before ordering.

Related parts

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Some lists are dated and the part may have been superseded. Information only, compatibility not guaranteed.